diff --git a/lib/upgrade.txt b/lib/upgrade.txt
index 508fa8d3b7c..7ef24c6608d 100644
--- a/lib/upgrade.txt
+++ b/lib/upgrade.txt
@@ -23,6 +23,8 @@ YUI:
     deprecated and replaced by the modal attribute. This was actually
     changed in Moodle 2.2, but has only been marked as deprecated now. It
     will be removed in Moodle 2.9.
+  * When destroying any type of dialogue based on moodle-core-notification, the relevant content is also removed from
+    the DOM. Previously it was left orphaned.
 
 JavaSript:
     * The findChildNodes global function has been deprecated. Y.all should
diff --git a/lib/yui/build/moodle-core-notification-alert/moodle-core-notification-alert-debug.js b/lib/yui/build/moodle-core-notification-alert/moodle-core-notification-alert-debug.js
index 2d90867b424..c16a3653b82 100644
--- a/lib/yui/build/moodle-core-notification-alert/moodle-core-notification-alert-debug.js
+++ b/lib/yui/build/moodle-core-notification-alert/moodle-core-notification-alert-debug.js
@@ -64,7 +64,6 @@ Y.extend(ALERT, M.core.dialogue, {
         this.setStdModContent(Y.WidgetStdMod.BODY, content, Y.WidgetStdMod.REPLACE);
         this.setStdModContent(Y.WidgetStdMod.HEADER,
                 '<h1 id="moodle-dialogue-'+this.get('COUNT')+'-header-text">' + this.get(TITLE) + '</h1>', Y.WidgetStdMod.REPLACE);
-        this.after('destroyedChange', function(){this.get(BASE).remove();}, this);
         this._enterKeypress = Y.on('key', this.submit, window, 'down:13', this);
         yes.on('click', this.submit, this);
     },
diff --git a/lib/yui/build/moodle-core-notification-alert/moodle-core-notification-alert-min.js b/lib/yui/build/moodle-core-notification-alert/moodle-core-notification-alert-min.js
index 18a02823ade..b78d2a9f370 100644
--- a/lib/yui/build/moodle-core-notification-alert/moodle-core-notification-alert-min.js
+++ b/lib/yui/build/moodle-core-notification-alert/moodle-core-notification-alert-min.js
@@ -1 +1 @@
-YUI.add("moodle-core-notification-alert",function(e,t){var n,r,i,s,o,u,a,f;n="moodle-dialogue",r="notificationBase",i=0,s="yesLabel",o="noLabel",u="title",a="question",f={BASE:"moodle-dialogue-base",WRAP:"moodle-dialogue-wrap",HEADER:"moodle-dialogue-hd",BODY:"moodle-dialogue-bd",CONTENT:"moodle-dialogue-content",FOOTER:"moodle-dialogue-ft",HIDDEN:"hidden",LIGHTBOX:"moodle-dialogue-lightbox"},M.core=M.core||{};var l="Moodle alert",c;c=function(e){e.closeButton=!1,c.superclass.constructor.apply(this,[e])},e.extend(c,M.core.dialogue,{_enterKeypress:null,initializer:function(){this.publish("complete");var t=e.Node.create('<input type="button" id="id_yuialertconfirm-'+this.get("COUNT")+'" value="'+this.get(s)+'" />'),n=e.Node.create('<div class="confirmation-dialogue"></div>').append(e.Node.create('<div class="confirmation-message">'+this.get("message")+"</div>")).append(e.Node.create('<div class="confirmation-buttons"></div>').append(t));this.get(r).addClass("moodle-dialogue-confirm"),this.setStdModContent(e.WidgetStdMod.BODY,n,e.WidgetStdMod.REPLACE),this.setStdModContent(e.WidgetStdMod.HEADER,'<h1 id="moodle-dialogue-'+this.get("COUNT")+'-header-text">'+this.get(u)+"</h1>",e.WidgetStdMod.REPLACE),this.after("destroyedChange",function(){this.get(r).remove()},this),this._enterKeypress=e.on("key",this.submit,window,"down:13",this),t.on("click",this.submit,this)},submit:function(){this._enterKeypress.detach(),this.fire("complete"),this.hide(),this.destroy()}},{NAME:l,CSS_PREFIX:n,ATTRS:{title:{validator:e.Lang.isString,value:"Alert"},message:{validator:e.Lang.isString,value:"Confirm"},yesLabel:{validator:e.Lang.isString,setter:function(e){return e||(e="Ok"),e},value:"Ok"}}}),M.core.alert=c},"@VERSION@",{requires:["moodle-core-notification-dialogue"]});
+YUI.add("moodle-core-notification-alert",function(e,t){var n,r,i,s,o,u,a,f;n="moodle-dialogue",r="notificationBase",i=0,s="yesLabel",o="noLabel",u="title",a="question",f={BASE:"moodle-dialogue-base",WRAP:"moodle-dialogue-wrap",HEADER:"moodle-dialogue-hd",BODY:"moodle-dialogue-bd",CONTENT:"moodle-dialogue-content",FOOTER:"moodle-dialogue-ft",HIDDEN:"hidden",LIGHTBOX:"moodle-dialogue-lightbox"},M.core=M.core||{};var l="Moodle alert",c;c=function(e){e.closeButton=!1,c.superclass.constructor.apply(this,[e])},e.extend(c,M.core.dialogue,{_enterKeypress:null,initializer:function(){this.publish("complete");var t=e.Node.create('<input type="button" id="id_yuialertconfirm-'+this.get("COUNT")+'" value="'+this.get(s)+'" />'),n=e.Node.create('<div class="confirmation-dialogue"></div>').append(e.Node.create('<div class="confirmation-message">'+this.get("message")+"</div>")).append(e.Node.create('<div class="confirmation-buttons"></div>').append(t));this.get(r).addClass("moodle-dialogue-confirm"),this.setStdModContent(e.WidgetStdMod.BODY,n,e.WidgetStdMod.REPLACE),this.setStdModContent(e.WidgetStdMod.HEADER,'<h1 id="moodle-dialogue-'+this.get("COUNT")+'-header-text">'+this.get(u)+"</h1>",e.WidgetStdMod.REPLACE),this._enterKeypress=e.on("key",this.submit,window,"down:13",this),t.on("click",this.submit,this)},submit:function(){this._enterKeypress.detach(),this.fire("complete"),this.hide(),this.destroy()}},{NAME:l,CSS_PREFIX:n,ATTRS:{title:{validator:e.Lang.isString,value:"Alert"},message:{validator:e.Lang.isString,value:"Confirm"},yesLabel:{validator:e.Lang.isString,setter:function(e){return e||(e="Ok"),e},value:"Ok"}}}),M.core.alert=c},"@VERSION@",{requires:["moodle-core-notification-dialogue"]});
diff --git a/lib/yui/build/moodle-core-notification-alert/moodle-core-notification-alert.js b/lib/yui/build/moodle-core-notification-alert/moodle-core-notification-alert.js
index 2d90867b424..c16a3653b82 100644
--- a/lib/yui/build/moodle-core-notification-alert/moodle-core-notification-alert.js
+++ b/lib/yui/build/moodle-core-notification-alert/moodle-core-notification-alert.js
@@ -64,7 +64,6 @@ Y.extend(ALERT, M.core.dialogue, {
         this.setStdModContent(Y.WidgetStdMod.BODY, content, Y.WidgetStdMod.REPLACE);
         this.setStdModContent(Y.WidgetStdMod.HEADER,
                 '<h1 id="moodle-dialogue-'+this.get('COUNT')+'-header-text">' + this.get(TITLE) + '</h1>', Y.WidgetStdMod.REPLACE);
-        this.after('destroyedChange', function(){this.get(BASE).remove();}, this);
         this._enterKeypress = Y.on('key', this.submit, window, 'down:13', this);
         yes.on('click', this.submit, this);
     },
diff --git a/lib/yui/build/moodle-core-notification-confirm/moodle-core-notification-confirm-debug.js b/lib/yui/build/moodle-core-notification-confirm/moodle-core-notification-confirm-debug.js
index cf8103cccdf..4336981bc0f 100644
--- a/lib/yui/build/moodle-core-notification-confirm/moodle-core-notification-confirm-debug.js
+++ b/lib/yui/build/moodle-core-notification-confirm/moodle-core-notification-confirm-debug.js
@@ -68,7 +68,6 @@ Y.extend(CONFIRM, M.core.dialogue, {
         this.setStdModContent(Y.WidgetStdMod.BODY, content, Y.WidgetStdMod.REPLACE);
         this.setStdModContent(Y.WidgetStdMod.HEADER,
                 '<h1 id="moodle-dialogue-'+this.get('COUNT')+'-header-text">' + this.get(TITLE) + '</h1>', Y.WidgetStdMod.REPLACE);
-        this.after('destroyedChange', function(){this.get(BASE).remove();}, this);
         this._enterKeypress = Y.on('key', this.submit, window, 'down:13', this, true);
         this._escKeypress = Y.on('key', this.submit, window, 'down:27', this, false);
         yes.on('click', this.submit, this, true);
diff --git a/lib/yui/build/moodle-core-notification-confirm/moodle-core-notification-confirm-min.js b/lib/yui/build/moodle-core-notification-confirm/moodle-core-notification-confirm-min.js
index cdef098e771..6f75da2bd6a 100644
--- a/lib/yui/build/moodle-core-notification-confirm/moodle-core-notification-confirm-min.js
+++ b/lib/yui/build/moodle-core-notification-confirm/moodle-core-notification-confirm-min.js
@@ -1 +1 @@
-YUI.add("moodle-core-notification-confirm",function(e,t){var n,r,i,s,o,u,a,f;n="moodle-dialogue",r="notificationBase",i=0,s="yesLabel",o="noLabel",u="title",a="question",f={BASE:"moodle-dialogue-base",WRAP:"moodle-dialogue-wrap",HEADER:"moodle-dialogue-hd",BODY:"moodle-dialogue-bd",CONTENT:"moodle-dialogue-content",FOOTER:"moodle-dialogue-ft",HIDDEN:"hidden",LIGHTBOX:"moodle-dialogue-lightbox"},M.core=M.core||{};var l="Moodle confirmation dialogue",c;c=function(e){c.superclass.constructor.apply(this,[e])},e.extend(c,M.core.dialogue,{_enterKeypress:null,_escKeypress:null,initializer:function(){this.publish("complete"),this.publish("complete-yes"),this.publish("complete-no");var t=e.Node.create('<input type="button" id="id_yuiconfirmyes-'+this.get("COUNT")+'" value="'+this.get(s)+'" />'),n=e.Node.create('<input type="button" id="id_yuiconfirmno-'+this.get("COUNT")+'" value="'+this.get(o)+'" />'),i=e.Node.create('<div class="confirmation-dialogue"></div>').append(e.Node.create('<div class="confirmation-message">'+this.get(a)+"</div>")).append(e.Node.create('<div class="confirmation-buttons"></div>').append(t).append(n));this.get(r).addClass("moodle-dialogue-confirm"),this.setStdModContent(e.WidgetStdMod.BODY,i,e.WidgetStdMod.REPLACE),this.setStdModContent(e.WidgetStdMod.HEADER,'<h1 id="moodle-dialogue-'+this.get("COUNT")+'-header-text">'+this.get(u)+"</h1>",e.WidgetStdMod.REPLACE),this.after("destroyedChange",function(){this.get(r).remove()},this),this._enterKeypress=e.on("key",this.submit,window,"down:13",this,!0),this._escKeypress=e.on("key",this.submit,window,"down:27",this,!1),t.on("click",this.submit,this,!0),n.on("click",this.submit,this,!1)},submit:function(e,t){this._enterKeypress.detach(),this._escKeypress.detach(),this.fire("complete",t),t?this.fire("complete-yes"):this.fire("complete-no"),this.hide(),this.destroy()}},{NAME:l,CSS_PREFIX:n,ATTRS:{yesLabel:{validator:e.Lang.isString,value:"Yes"},noLabel:{validator:e.Lang.isString,value:"No"},title:{validator:e.Lang.isString,value:"Confirm"},question:{validator:e.Lang.isString,value:"Are you sure?"}}}),e.augment(c,e.EventTarget),M.core.confirm=c},"@VERSION@",{requires:["moodle-core-notification-dialogue"]});
+YUI.add("moodle-core-notification-confirm",function(e,t){var n,r,i,s,o,u,a,f;n="moodle-dialogue",r="notificationBase",i=0,s="yesLabel",o="noLabel",u="title",a="question",f={BASE:"moodle-dialogue-base",WRAP:"moodle-dialogue-wrap",HEADER:"moodle-dialogue-hd",BODY:"moodle-dialogue-bd",CONTENT:"moodle-dialogue-content",FOOTER:"moodle-dialogue-ft",HIDDEN:"hidden",LIGHTBOX:"moodle-dialogue-lightbox"},M.core=M.core||{};var l="Moodle confirmation dialogue",c;c=function(e){c.superclass.constructor.apply(this,[e])},e.extend(c,M.core.dialogue,{_enterKeypress:null,_escKeypress:null,initializer:function(){this.publish("complete"),this.publish("complete-yes"),this.publish("complete-no");var t=e.Node.create('<input type="button" id="id_yuiconfirmyes-'+this.get("COUNT")+'" value="'+this.get(s)+'" />'),n=e.Node.create('<input type="button" id="id_yuiconfirmno-'+this.get("COUNT")+'" value="'+this.get(o)+'" />'),i=e.Node.create('<div class="confirmation-dialogue"></div>').append(e.Node.create('<div class="confirmation-message">'+this.get(a)+"</div>")).append(e.Node.create('<div class="confirmation-buttons"></div>').append(t).append(n));this.get(r).addClass("moodle-dialogue-confirm"),this.setStdModContent(e.WidgetStdMod.BODY,i,e.WidgetStdMod.REPLACE),this.setStdModContent(e.WidgetStdMod.HEADER,'<h1 id="moodle-dialogue-'+this.get("COUNT")+'-header-text">'+this.get(u)+"</h1>",e.WidgetStdMod.REPLACE),this._enterKeypress=e.on("key",this.submit,window,"down:13",this,!0),this._escKeypress=e.on("key",this.submit,window,"down:27",this,!1),t.on("click",this.submit,this,!0),n.on("click",this.submit,this,!1)},submit:function(e,t){this._enterKeypress.detach(),this._escKeypress.detach(),this.fire("complete",t),t?this.fire("complete-yes"):this.fire("complete-no"),this.hide(),this.destroy()}},{NAME:l,CSS_PREFIX:n,ATTRS:{yesLabel:{validator:e.Lang.isString,value:"Yes"},noLabel:{validator:e.Lang.isString,value:"No"},title:{validator:e.Lang.isString,value:"Confirm"},question:{validator:e.Lang.isString,value:"Are you sure?"}}}),e.augment(c,e.EventTarget),M.core.confirm=c},"@VERSION@",{requires:["moodle-core-notification-dialogue"]});
diff --git a/lib/yui/build/moodle-core-notification-confirm/moodle-core-notification-confirm.js b/lib/yui/build/moodle-core-notification-confirm/moodle-core-notification-confirm.js
index cf8103cccdf..4336981bc0f 100644
--- a/lib/yui/build/moodle-core-notification-confirm/moodle-core-notification-confirm.js
+++ b/lib/yui/build/moodle-core-notification-confirm/moodle-core-notification-confirm.js
@@ -68,7 +68,6 @@ Y.extend(CONFIRM, M.core.dialogue, {
         this.setStdModContent(Y.WidgetStdMod.BODY, content, Y.WidgetStdMod.REPLACE);
         this.setStdModContent(Y.WidgetStdMod.HEADER,
                 '<h1 id="moodle-dialogue-'+this.get('COUNT')+'-header-text">' + this.get(TITLE) + '</h1>', Y.WidgetStdMod.REPLACE);
-        this.after('destroyedChange', function(){this.get(BASE).remove();}, this);
         this._enterKeypress = Y.on('key', this.submit, window, 'down:13', this, true);
         this._escKeypress = Y.on('key', this.submit, window, 'down:27', this, false);
         yes.on('click', this.submit, this, true);
diff --git a/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-debug.js b/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-debug.js
index 2e691ac126b..2e4bc5d28d1 100644
--- a/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-debug.js
+++ b/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-debug.js
@@ -142,6 +142,11 @@ Y.extend(DIALOGUE, Y.Panel, {
             this.show();
             this.keyDelegation();
         }
+
+        // Remove the dialogue from the DOM when it is destroyed.
+        this.after('destroyedChange', function(){
+            this.get(BASE).remove(true);
+        }, this);
     },
 
     /**
diff --git a/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-min.js b/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-min.js
index 138747bf7e8..313aa1cf32a 100644
--- a/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-min.js
+++ b/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue-min.js
@@ -1 +1 @@
-YUI.add("moodle-core-notification-dialogue",function(e,t){var n,r,i,s,o,u,a,f;n="moodle-dialogue",r="notificationBase",i=0,s="yesLabel",o="noLabel",u="title",a="question",f={BASE:"moodle-dialogue-base",WRAP:"moodle-dialogue-wrap",HEADER:"moodle-dialogue-hd",BODY:"moodle-dialogue-bd",CONTENT:"moodle-dialogue-content",FOOTER:"moodle-dialogue-ft",HIDDEN:"hidden",LIGHTBOX:"moodle-dialogue-lightbox"},M.core=M.core||{};var l="Moodle dialogue",c,h=n+"-fullscreen",p=n+"-hidden",d=" [role=dialog]",v="[role=menubar]",m=".moodle-has-zindex",g='input:not([type="hidden"]), a[href], button, textarea, select, [tabindex]';c=function(t){var n=e.clone(t);i++;var r="moodle-dialogue-"+i;n.notificationBase=e.Node.create('<div class="'+f.BASE+'">').append(e.Node.create('<div id="'+r+'" role="dialog" aria-labelledby="'+r+'-header-text" class="'+f.WRAP+'"></div>').append(e.Node.create('<div id="'+r+'-header-text" class="'+f.HEADER+' yui3-widget-hd"></div>')).append(e.Node.create('<div class="'+f.BODY+' yui3-widget-bd"></div>')).append(e.Node.create('<div class="'+f.FOOTER+' yui3-widget-ft"></div>'))),e.one(document.body).append(n.notificationBase),n.additionalBaseClass&&n.notificationBase.addClass(n.additionalBaseClass),n.srcNode="#"+r,n.COUNT=i,n.closeButton===!1?n.buttons=null:n.buttons=[{section:e.WidgetStdMod.HEADER,classNames:"closebutton",action:function(){this.hide()}}],c.superclass.constructor.apply(this,[n]),n.closeButton!==!1&&this.get("buttons").header[0].setAttribute("title",this.get("closeButtonTitle"))},e.extend(c,e.Panel,{_resizeevent:null,_orientationevent:null,_calculatedzindex:!1,initializer:function(t){var n;this.get("render")&&this.render(),this.makeResponsive(),this.after("visibleChange",this.visibilityChanged,this),t.center&&this.centerDialogue(),this.set("COUNT",i),this.get("modal")&&this.plug(e.M.core.LockScroll),n=this.get("boundingBox"),t.extraClasses&&e.Array.each(t.extraClasses,n.addClass,n),t.visible&&this.applyZIndex(),this.on("maskShow",this.applyZIndex),t.visible&&(this.show(),this.keyDelegation())},applyZIndex:function(){var t=1,n=1,r=this.get("boundingBox"),i=this.get("maskNode"),s=this.get("zIndex");s!==0&&!this._calculatedzindex?r.setStyle("zIndex",s):(e.all(d+", "+v+", "+m).each(function(e){var n=this.findZIndex(e);n>t&&(t=n)},this),n=(t+1).toString(),r.setStyle("zIndex",n),i.setStyle("zIndex",n),this.set("zIndex",n),this._calculatedzindex=!0)},findZIndex:function(e){var t=e.getStyle("zIndex")||e.ancestor().getStyle("zIndex");return t?parseInt(t,10):0},visibilityChanged:function(t){var n,r;t.attrName==="visible"&&(this.get("maskNode").addClass(f.LIGHTBOX),t.prevVal&&!t.newVal&&(r=this.get("boundingBox"),this._resizeevent&&(this._resizeevent.detach(),this._resizeevent=null),this._orientationevent&&(this._orientationevent.detach(),this._orientationevent=null),r.detach("key",this.keyDelegation)),!t.prevVal&&t.newVal&&(this.applyZIndex(),this.makeResponsive(),this.shouldResizeFullscreen()||this.get("draggable")&&(n="#"+this.get("id")+" ."+f.HEADER,this.plug(e.Plugin.Drag,{handles:[n]}),e.one(n).setStyle("cursor","move")),this.keyDelegation()),this.get("center")&&!t.prevVal&&t.newVal&&this.centerDialogue())},makeResponsive:function(){var t=this.get("boundingBox"),n;this.shouldResizeFullscreen()?(t.addClass(h),t.setStyles({left:null,top:null,width:null,height:null,right:null,bottom:null}),n=e.one("#"+this.get("id")+" ."+f.BODY)):this.get("responsive")&&(t.removeClass(h).setStyles({width:this.get("width"),height:this.get("height")}),n=e.one("#"+this.get("id")+" ."+f.BODY))},centerDialogue:function(){var t=this.get("boundingBox"),n=t.hasClass(p),r,i;if(this.shouldResizeFullscreen())return;n&&t.setStyle("top","-1000px").removeClass(p),r=Math.max(Math.round((t.get("winWidth")-t.get("offsetWidth"))/2),15),i=Math.max(Math.round((t.get("winHeight")-t.get("offsetHeight"))/2),15)+e.one(window).get("scrollTop"),t.setStyles({left:r,top:i}),n&&t.addClass(p)},shouldResizeFullscreen:function(){return window===window.parent&&this.get("responsive")&&Math.floor(e.one(document.body).get("winWidth"))<this.get("responsiveWidth")},show:function(){var e=null,t=this.headerNode,n=this.bodyNode;return this.lockScroll&&this.lockScroll.enableScrollLock(),e=c.superclass.show.call(this),t&&t!==""?t.focus():n&&n!==""&&n.focus(),e},hide:function(){return this.lockScroll&&this.lockScroll.disableScrollLock(),c.superclass.hide.call(this,arguments)},keyDelegation:function(){var e=this.get("boundingBox");e.delegate("key",function(e){var t=e.target,n="forward";e.shiftKey&&(n="backward"),this.trapFocus(t,n)&&e.preventDefault()},"down:9",g,this)},trapFocus:function(e,t){var n=this.get("boundingBox"),r=n.one(g),i=n.all(g).pop();if(e===i&&t==="forward")return r.focus();if(e===r&&t==="backward")return i.focus()}},{NAME:l,CSS_PREFIX:n,ATTRS:{notificationBase:{},lightbox:{lazyAdd:!1,setter:function(e){this.set("modal",e)}},closeButton:{validator:e.Lang.isBoolean,value:!0},closeButtonTitle:{validator:e.Lang.isString,value:"Close"},center:{validator:e.Lang.isBoolean,value:!0},draggable:{validator:e.Lang.isBoolean,value:!1},COUNT:{value:0},responsive:{validator:e.Lang.isBoolean,value:!0},responsiveWidth:{value:768}}}),e.Base.modifyAttrs(c,{width:{value:"400px",setter:function(e){return e==="auto"?"":e}},visible:{value:!1},centered:{setter:function(e){return e&&this.set("center",!0),!1}},render:{value:!0,writeOnce:!0}}),M.core.dialogue=c},"@VERSION@",{requires:["base","node","panel","event-key","dd-plugin","moodle-core-lockscroll"]});
+YUI.add("moodle-core-notification-dialogue",function(e,t){var n,r,i,s,o,u,a,f;n="moodle-dialogue",r="notificationBase",i=0,s="yesLabel",o="noLabel",u="title",a="question",f={BASE:"moodle-dialogue-base",WRAP:"moodle-dialogue-wrap",HEADER:"moodle-dialogue-hd",BODY:"moodle-dialogue-bd",CONTENT:"moodle-dialogue-content",FOOTER:"moodle-dialogue-ft",HIDDEN:"hidden",LIGHTBOX:"moodle-dialogue-lightbox"},M.core=M.core||{};var l="Moodle dialogue",c,h=n+"-fullscreen",p=n+"-hidden",d=" [role=dialog]",v="[role=menubar]",m=".moodle-has-zindex",g='input:not([type="hidden"]), a[href], button, textarea, select, [tabindex]';c=function(t){var n=e.clone(t);i++;var r="moodle-dialogue-"+i;n.notificationBase=e.Node.create('<div class="'+f.BASE+'">').append(e.Node.create('<div id="'+r+'" role="dialog" aria-labelledby="'+r+'-header-text" class="'+f.WRAP+'"></div>').append(e.Node.create('<div id="'+r+'-header-text" class="'+f.HEADER+' yui3-widget-hd"></div>')).append(e.Node.create('<div class="'+f.BODY+' yui3-widget-bd"></div>')).append(e.Node.create('<div class="'+f.FOOTER+' yui3-widget-ft"></div>'))),e.one(document.body).append(n.notificationBase),n.additionalBaseClass&&n.notificationBase.addClass(n.additionalBaseClass),n.srcNode="#"+r,n.COUNT=i,n.closeButton===!1?n.buttons=null:n.buttons=[{section:e.WidgetStdMod.HEADER,classNames:"closebutton",action:function(){this.hide()}}],c.superclass.constructor.apply(this,[n]),n.closeButton!==!1&&this.get("buttons").header[0].setAttribute("title",this.get("closeButtonTitle"))},e.extend(c,e.Panel,{_resizeevent:null,_orientationevent:null,_calculatedzindex:!1,initializer:function(t){var n;this.get("render")&&this.render(),this.makeResponsive(),this.after("visibleChange",this.visibilityChanged,this),t.center&&this.centerDialogue(),this.set("COUNT",i),this.get("modal")&&this.plug(e.M.core.LockScroll),n=this.get("boundingBox"),t.extraClasses&&e.Array.each(t.extraClasses,n.addClass,n),t.visible&&this.applyZIndex(),this.on("maskShow",this.applyZIndex),t.visible&&(this.show(),this.keyDelegation()),this.after("destroyedChange",function(){this.get(r).remove(!0)},this)},applyZIndex:function(){var t=1,n=1,r=this.get("boundingBox"),i=this.get("maskNode"),s=this.get("zIndex");s!==0&&!this._calculatedzindex?r.setStyle("zIndex",s):(e.all(d+", "+v+", "+m).each(function(e){var n=this.findZIndex(e);n>t&&(t=n)},this),n=(t+1).toString(),r.setStyle("zIndex",n),i.setStyle("zIndex",n),this.set("zIndex",n),this._calculatedzindex=!0)},findZIndex:function(e){var t=e.getStyle("zIndex")||e.ancestor().getStyle("zIndex");return t?parseInt(t,10):0},visibilityChanged:function(t){var n,r;t.attrName==="visible"&&(this.get("maskNode").addClass(f.LIGHTBOX),t.prevVal&&!t.newVal&&(r=this.get("boundingBox"),this._resizeevent&&(this._resizeevent.detach(),this._resizeevent=null),this._orientationevent&&(this._orientationevent.detach(),this._orientationevent=null),r.detach("key",this.keyDelegation)),!t.prevVal&&t.newVal&&(this.applyZIndex(),this.makeResponsive(),this.shouldResizeFullscreen()||this.get("draggable")&&(n="#"+this.get("id")+" ."+f.HEADER,this.plug(e.Plugin.Drag,{handles:[n]}),e.one(n).setStyle("cursor","move")),this.keyDelegation()),this.get("center")&&!t.prevVal&&t.newVal&&this.centerDialogue())},makeResponsive:function(){var t=this.get("boundingBox"),n;this.shouldResizeFullscreen()?(t.addClass(h),t.setStyles({left:null,top:null,width:null,height:null,right:null,bottom:null}),n=e.one("#"+this.get("id")+" ."+f.BODY)):this.get("responsive")&&(t.removeClass(h).setStyles({width:this.get("width"),height:this.get("height")}),n=e.one("#"+this.get("id")+" ."+f.BODY))},centerDialogue:function(){var t=this.get("boundingBox"),n=t.hasClass(p),r,i;if(this.shouldResizeFullscreen())return;n&&t.setStyle("top","-1000px").removeClass(p),r=Math.max(Math.round((t.get("winWidth")-t.get("offsetWidth"))/2),15),i=Math.max(Math.round((t.get("winHeight")-t.get("offsetHeight"))/2),15)+e.one(window).get("scrollTop"),t.setStyles({left:r,top:i}),n&&t.addClass(p)},shouldResizeFullscreen:function(){return window===window.parent&&this.get("responsive")&&Math.floor(e.one(document.body).get("winWidth"))<this.get("responsiveWidth")},show:function(){var e=null,t=this.headerNode,n=this.bodyNode;return this.lockScroll&&this.lockScroll.enableScrollLock(),e=c.superclass.show.call(this),t&&t!==""?t.focus():n&&n!==""&&n.focus(),e},hide:function(){return this.lockScroll&&this.lockScroll.disableScrollLock(),c.superclass.hide.call(this,arguments)},keyDelegation:function(){var e=this.get("boundingBox");e.delegate("key",function(e){var t=e.target,n="forward";e.shiftKey&&(n="backward"),this.trapFocus(t,n)&&e.preventDefault()},"down:9",g,this)},trapFocus:function(e,t){var n=this.get("boundingBox"),r=n.one(g),i=n.all(g).pop();if(e===i&&t==="forward")return r.focus();if(e===r&&t==="backward")return i.focus()}},{NAME:l,CSS_PREFIX:n,ATTRS:{notificationBase:{},lightbox:{lazyAdd:!1,setter:function(e){this.set("modal",e)}},closeButton:{validator:e.Lang.isBoolean,value:!0},closeButtonTitle:{validator:e.Lang.isString,value:"Close"},center:{validator:e.Lang.isBoolean,value:!0},draggable:{validator:e.Lang.isBoolean,value:!1},COUNT:{value:0},responsive:{validator:e.Lang.isBoolean,value:!0},responsiveWidth:{value:768}}}),e.Base.modifyAttrs(c,{width:{value:"400px",setter:function(e){return e==="auto"?"":e}},visible:{value:!1},centered:{setter:function(e){return e&&this.set("center",!0),!1}},render:{value:!0,writeOnce:!0}}),M.core.dialogue=c},"@VERSION@",{requires:["base","node","panel","event-key","dd-plugin","moodle-core-lockscroll"]});
diff --git a/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue.js b/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue.js
index cf96f862c74..27a544a895b 100644
--- a/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue.js
+++ b/lib/yui/build/moodle-core-notification-dialogue/moodle-core-notification-dialogue.js
@@ -142,6 +142,11 @@ Y.extend(DIALOGUE, Y.Panel, {
             this.show();
             this.keyDelegation();
         }
+
+        // Remove the dialogue from the DOM when it is destroyed.
+        this.after('destroyedChange', function(){
+            this.get(BASE).remove(true);
+        }, this);
     },
 
     /**
diff --git a/lib/yui/build/moodle-core-notification-exception/moodle-core-notification-exception-debug.js b/lib/yui/build/moodle-core-notification-exception/moodle-core-notification-exception-debug.js
index 065a4e259c9..c4687f0e5f4 100644
--- a/lib/yui/build/moodle-core-notification-exception/moodle-core-notification-exception-debug.js
+++ b/lib/yui/build/moodle-core-notification-exception/moodle-core-notification-exception-debug.js
@@ -80,7 +80,6 @@ Y.extend(EXCEPTION, M.core.dialogue, {
             this._hideTimeout = setTimeout(function(){self.hide();}, delay);
         }
         this.after('visibleChange', this.visibilityChanged, this);
-        this.after('destroyedChange', function(){this.get(BASE).remove();}, this);
         this._keypress = Y.on('key', this.hide, window, 'down:13,27', this);
         this.centerDialogue();
     },
diff --git a/lib/yui/build/moodle-core-notification-exception/moodle-core-notification-exception-min.js b/lib/yui/build/moodle-core-notification-exception/moodle-core-notification-exception-min.js
index 731bf9f0768..b1177b126ed 100644
--- a/lib/yui/build/moodle-core-notification-exception/moodle-core-notification-exception-min.js
+++ b/lib/yui/build/moodle-core-notification-exception/moodle-core-notification-exception-min.js
@@ -1 +1 @@
-YUI.add("moodle-core-notification-exception",function(e,t){var n,r,i,s,o,u,a,f;n="moodle-dialogue",r="notificationBase",i=0,s="yesLabel",o="noLabel",u="title",a="question",f={BASE:"moodle-dialogue-base",WRAP:"moodle-dialogue-wrap",HEADER:"moodle-dialogue-hd",BODY:"moodle-dialogue-bd",CONTENT:"moodle-dialogue-content",FOOTER:"moodle-dialogue-ft",HIDDEN:"hidden",LIGHTBOX:"moodle-dialogue-lightbox"},M.core=M.core||{};var l="Moodle exception",c;c=function(t){t.width=t.width||M.cfg.developerdebug?Math.floor(e.one(document.body).get("winWidth")/3)+"px":null,t.closeButton=!0,c.superclass.constructor.apply(this,[t])},e.extend(c,M.core.dialogue,{_hideTimeout:null,_keypress:null,initializer:function(t){var n,s=this,o=this.get("hideTimeoutDelay");this.get(r).addClass("moodle-dialogue-exception"),this.setStdModContent(e.WidgetStdMod.HEADER,'<h1 id="moodle-dialogue-'+i+'-header-text">'+t.name+"</h1>",e.WidgetStdMod.REPLACE),n=e.Node.create('<div class="moodle-exception"></div>').append(e.Node.create('<div class="moodle-exception-message">'+this.get("message")+"</div>")).append(e.Node.create('<div class="moodle-exception-param hidden param-filename"><label>File:</label> '+this.get("fileName")+"</div>")).append(e.Node.create('<div class="moodle-exception-param hidden param-linenumber"><label>Line:</label> '+this.get("lineNumber")+"</div>")).append(e.Node.create('<div class="moodle-exception-param hidden param-stacktrace"><label>Stack trace:</label> <pre>'+this.get("stack")+"</pre></div>")),M.cfg.developerdebug&&n.all(".moodle-exception-param").removeClass("hidden"),this.setStdModContent(e.WidgetStdMod.BODY,n,e.WidgetStdMod.REPLACE),o&&(this._hideTimeout=setTimeout(function(){s.hide()},o)),this.after("visibleChange",this.visibilityChanged,this),this.after("destroyedChange",function(){this.get(r).remove()},this),this._keypress=e.on("key",this.hide,window,"down:13,27",this),this.centerDialogue()},visibilityChanged:function(e){if(e.attrName==="visible"&&e.prevVal&&!e.newVal){this._keypress&&this._keypress.detach();var t=this;setTimeout(function(){t.destroy()},1e3)}}},{NAME:l,CSS_PREFIX:n,ATTRS:{message:{value:""},name:{value:""},fileName:{value:""},lineNumber:{value:""},stack:{setter:function(e){var t=e.split("\n"),n=new RegExp("^(.+)@("+M.cfg.wwwroot+")?(.{0,75}).*:(\\d+)$"),r;for(r in t)t[r]=t[r].replace(n,"<div class='stacktrace-line'>ln: $4</div><div class='stacktrace-file'>$3</div><div class='stacktrace-call'>$1</div>");return t.join("")},value:""},hideTimeoutDelay:{validator:e.Lang.isNumber,value:null}}}),M.core.exception=c},"@VERSION@",{requires:["moodle-core-notification-dialogue"]});
+YUI.add("moodle-core-notification-exception",function(e,t){var n,r,i,s,o,u,a,f;n="moodle-dialogue",r="notificationBase",i=0,s="yesLabel",o="noLabel",u="title",a="question",f={BASE:"moodle-dialogue-base",WRAP:"moodle-dialogue-wrap",HEADER:"moodle-dialogue-hd",BODY:"moodle-dialogue-bd",CONTENT:"moodle-dialogue-content",FOOTER:"moodle-dialogue-ft",HIDDEN:"hidden",LIGHTBOX:"moodle-dialogue-lightbox"},M.core=M.core||{};var l="Moodle exception",c;c=function(t){t.width=t.width||M.cfg.developerdebug?Math.floor(e.one(document.body).get("winWidth")/3)+"px":null,t.closeButton=!0,c.superclass.constructor.apply(this,[t])},e.extend(c,M.core.dialogue,{_hideTimeout:null,_keypress:null,initializer:function(t){var n,s=this,o=this.get("hideTimeoutDelay");this.get(r).addClass("moodle-dialogue-exception"),this.setStdModContent(e.WidgetStdMod.HEADER,'<h1 id="moodle-dialogue-'+i+'-header-text">'+t.name+"</h1>",e.WidgetStdMod.REPLACE),n=e.Node.create('<div class="moodle-exception"></div>').append(e.Node.create('<div class="moodle-exception-message">'+this.get("message")+"</div>")).append(e.Node.create('<div class="moodle-exception-param hidden param-filename"><label>File:</label> '+this.get("fileName")+"</div>")).append(e.Node.create('<div class="moodle-exception-param hidden param-linenumber"><label>Line:</label> '+this.get("lineNumber")+"</div>")).append(e.Node.create('<div class="moodle-exception-param hidden param-stacktrace"><label>Stack trace:</label> <pre>'+this.get("stack")+"</pre></div>")),M.cfg.developerdebug&&n.all(".moodle-exception-param").removeClass("hidden"),this.setStdModContent(e.WidgetStdMod.BODY,n,e.WidgetStdMod.REPLACE),o&&(this._hideTimeout=setTimeout(function(){s.hide()},o)),this.after("visibleChange",this.visibilityChanged,this),this._keypress=e.on("key",this.hide,window,"down:13,27",this),this.centerDialogue()},visibilityChanged:function(e){if(e.attrName==="visible"&&e.prevVal&&!e.newVal){this._keypress&&this._keypress.detach();var t=this;setTimeout(function(){t.destroy()},1e3)}}},{NAME:l,CSS_PREFIX:n,ATTRS:{message:{value:""},name:{value:""},fileName:{value:""},lineNumber:{value:""},stack:{setter:function(e){var t=e.split("\n"),n=new RegExp("^(.+)@("+M.cfg.wwwroot+")?(.{0,75}).*:(\\d+)$"),r;for(r in t)t[r]=t[r].replace(n,"<div class='stacktrace-line'>ln: $4</div><div class='stacktrace-file'>$3</div><div class='stacktrace-call'>$1</div>");return t.join("")},value:""},hideTimeoutDelay:{validator:e.Lang.isNumber,value:null}}}),M.core.exception=c},"@VERSION@",{requires:["moodle-core-notification-dialogue"]});
diff --git a/lib/yui/build/moodle-core-notification-exception/moodle-core-notification-exception.js b/lib/yui/build/moodle-core-notification-exception/moodle-core-notification-exception.js
index 065a4e259c9..c4687f0e5f4 100644
--- a/lib/yui/build/moodle-core-notification-exception/moodle-core-notification-exception.js
+++ b/lib/yui/build/moodle-core-notification-exception/moodle-core-notification-exception.js
@@ -80,7 +80,6 @@ Y.extend(EXCEPTION, M.core.dialogue, {
             this._hideTimeout = setTimeout(function(){self.hide();}, delay);
         }
         this.after('visibleChange', this.visibilityChanged, this);
-        this.after('destroyedChange', function(){this.get(BASE).remove();}, this);
         this._keypress = Y.on('key', this.hide, window, 'down:13,27', this);
         this.centerDialogue();
     },
diff --git a/lib/yui/src/notification/js/alert.js b/lib/yui/src/notification/js/alert.js
index f51c20b03ac..c6ea2e459db 100644
--- a/lib/yui/src/notification/js/alert.js
+++ b/lib/yui/src/notification/js/alert.js
@@ -33,7 +33,6 @@ Y.extend(ALERT, M.core.dialogue, {
         this.setStdModContent(Y.WidgetStdMod.BODY, content, Y.WidgetStdMod.REPLACE);
         this.setStdModContent(Y.WidgetStdMod.HEADER,
                 '<h1 id="moodle-dialogue-'+this.get('COUNT')+'-header-text">' + this.get(TITLE) + '</h1>', Y.WidgetStdMod.REPLACE);
-        this.after('destroyedChange', function(){this.get(BASE).remove();}, this);
         this._enterKeypress = Y.on('key', this.submit, window, 'down:13', this);
         yes.on('click', this.submit, this);
     },
diff --git a/lib/yui/src/notification/js/confirm.js b/lib/yui/src/notification/js/confirm.js
index fe80edc7e9e..a5313d8c31d 100644
--- a/lib/yui/src/notification/js/confirm.js
+++ b/lib/yui/src/notification/js/confirm.js
@@ -37,7 +37,6 @@ Y.extend(CONFIRM, M.core.dialogue, {
         this.setStdModContent(Y.WidgetStdMod.BODY, content, Y.WidgetStdMod.REPLACE);
         this.setStdModContent(Y.WidgetStdMod.HEADER,
                 '<h1 id="moodle-dialogue-'+this.get('COUNT')+'-header-text">' + this.get(TITLE) + '</h1>', Y.WidgetStdMod.REPLACE);
-        this.after('destroyedChange', function(){this.get(BASE).remove();}, this);
         this._enterKeypress = Y.on('key', this.submit, window, 'down:13', this, true);
         this._escKeypress = Y.on('key', this.submit, window, 'down:27', this, false);
         yes.on('click', this.submit, this, true);
diff --git a/lib/yui/src/notification/js/dialogue.js b/lib/yui/src/notification/js/dialogue.js
index 25a0c83c412..2f3424a71fe 100644
--- a/lib/yui/src/notification/js/dialogue.js
+++ b/lib/yui/src/notification/js/dialogue.js
@@ -111,6 +111,11 @@ Y.extend(DIALOGUE, Y.Panel, {
             this.show();
             this.keyDelegation();
         }
+
+        // Remove the dialogue from the DOM when it is destroyed.
+        this.after('destroyedChange', function(){
+            this.get(BASE).remove(true);
+        }, this);
     },
 
     /**
diff --git a/lib/yui/src/notification/js/exception.js b/lib/yui/src/notification/js/exception.js
index ed4324c284b..ebd83f6df2c 100644
--- a/lib/yui/src/notification/js/exception.js
+++ b/lib/yui/src/notification/js/exception.js
@@ -49,7 +49,6 @@ Y.extend(EXCEPTION, M.core.dialogue, {
             this._hideTimeout = setTimeout(function(){self.hide();}, delay);
         }
         this.after('visibleChange', this.visibilityChanged, this);
-        this.after('destroyedChange', function(){this.get(BASE).remove();}, this);
         this._keypress = Y.on('key', this.hide, window, 'down:13,27', this);
         this.centerDialogue();
     },