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 c69f9b50bb7..1ff144eb7ca 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
@@ -46,9 +46,24 @@ var EXCEPTION_NAME = 'Moodle exception',
  * @class M.core.exception
  * @extends M.core.dialogue
  */
-EXCEPTION = function(config) {
+EXCEPTION = function(c) {
+    var config = Y.mix({}, c);
     config.width = config.width || (M.cfg.developerdebug)?Math.floor(Y.one(document.body).get('winWidth')/3)+'px':null;
     config.closeButton = true;
+
+    // We need to whitelist some properties which are part of the exception
+    // prototype, otherwise AttributeCore filters them during value normalisation.
+    var whitelist = [
+        'message',
+        'name',
+        'fileName',
+        'lineNumber',
+        'stack'
+    ];
+    Y.Array.each(whitelist, function(k) {
+        config[k] = c[k];
+    });
+
     EXCEPTION.superclass.constructor.apply(this, [config]);
 };
 Y.extend(EXCEPTION, M.core.dialogue, {
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 326c1c6514f..44d504af71c 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;n="moodle-dialogue",r="notificationBase",i="yesLabel",s="noLabel",o="title",u="question",a={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 f="Moodle exception",l;l=function(t){t.width=t.width||M.cfg.developerdebug?Math.floor(e.one(document.body).get("winWidth")/3)+"px":null,t.closeButton=!0,l.superclass.constructor.apply(this,[t])},e.extend(l,M.core.dialogue,{_hideTimeout:null,_keypress:null,initializer:function(t){var n,i=this,s=this.get("hideTimeoutDelay");this.get(r).addClass("moodle-dialogue-exception"),this.setStdModContent(e.WidgetStdMod.HEADER,'<h1 id="moodle-dialogue-'+t.COUNT+'-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),s&&(this._hideTimeout=setTimeout(function(){i.hide()},s)),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:f,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=l},"@VERSION@",{requires:["moodle-core-notification-dialogue"]});
+YUI.add("moodle-core-notification-exception",function(e,t){var n,r,i,s,o,u,a;n="moodle-dialogue",r="notificationBase",i="yesLabel",s="noLabel",o="title",u="question",a={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 f="Moodle exception",l;l=function(t){var n=e.mix({},t);n.width=n.width||M.cfg.developerdebug?Math.floor(e.one(document.body).get("winWidth")/3)+"px":null,n.closeButton=!0;var r=["message","name","fileName","lineNumber","stack"];e.Array.each(r,function(e){n[e]=t[e]}),l.superclass.constructor.apply(this,[n])},e.extend(l,M.core.dialogue,{_hideTimeout:null,_keypress:null,initializer:function(t){var n,i=this,s=this.get("hideTimeoutDelay");this.get(r).addClass("moodle-dialogue-exception"),this.setStdModContent(e.WidgetStdMod.HEADER,'<h1 id="moodle-dialogue-'+t.COUNT+'-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),s&&(this._hideTimeout=setTimeout(function(){i.hide()},s)),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:f,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=l},"@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 c69f9b50bb7..1ff144eb7ca 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
@@ -46,9 +46,24 @@ var EXCEPTION_NAME = 'Moodle exception',
  * @class M.core.exception
  * @extends M.core.dialogue
  */
-EXCEPTION = function(config) {
+EXCEPTION = function(c) {
+    var config = Y.mix({}, c);
     config.width = config.width || (M.cfg.developerdebug)?Math.floor(Y.one(document.body).get('winWidth')/3)+'px':null;
     config.closeButton = true;
+
+    // We need to whitelist some properties which are part of the exception
+    // prototype, otherwise AttributeCore filters them during value normalisation.
+    var whitelist = [
+        'message',
+        'name',
+        'fileName',
+        'lineNumber',
+        'stack'
+    ];
+    Y.Array.each(whitelist, function(k) {
+        config[k] = c[k];
+    });
+
     EXCEPTION.superclass.constructor.apply(this, [config]);
 };
 Y.extend(EXCEPTION, M.core.dialogue, {
diff --git a/lib/yui/src/notification/js/exception.js b/lib/yui/src/notification/js/exception.js
index 1d11dc3da1b..ea8f4a5fe3f 100644
--- a/lib/yui/src/notification/js/exception.js
+++ b/lib/yui/src/notification/js/exception.js
@@ -17,9 +17,24 @@ var EXCEPTION_NAME = 'Moodle exception',
  * @class M.core.exception
  * @extends M.core.dialogue
  */
-EXCEPTION = function(config) {
+EXCEPTION = function(c) {
+    var config = Y.mix({}, c);
     config.width = config.width || (M.cfg.developerdebug)?Math.floor(Y.one(document.body).get('winWidth')/3)+'px':null;
     config.closeButton = true;
+
+    // We need to whitelist some properties which are part of the exception
+    // prototype, otherwise AttributeCore filters them during value normalisation.
+    var whitelist = [
+        'message',
+        'name',
+        'fileName',
+        'lineNumber',
+        'stack'
+    ];
+    Y.Array.each(whitelist, function(k) {
+        config[k] = c[k];
+    });
+
     EXCEPTION.superclass.constructor.apply(this, [config]);
 };
 Y.extend(EXCEPTION, M.core.dialogue, {