diff --git a/admin/langdoc.php b/admin/langdoc.php
index d9f6b3e526b..604df51739e 100755
--- a/admin/langdoc.php
+++ b/admin/langdoc.php
@@ -186,7 +186,7 @@ $langdir/$currentfile")."</font></p>";
 
         echo "<textarea rows=\"$fileeditorrows\" cols=\"$fileeditorcols\" name=\"filedata\">\n";
         if (file_exists("$langdir/$currentfile")) {
-	    echo htmlspecialchars(file_get_contents("$langdir/$currentfile"));
+            echo htmlspecialchars(file_get_contents("$langdir/$currentfile"));
         } else {
             echo ($filetemplate);
         }
diff --git a/admin/modules.php b/admin/modules.php
index 24d426c6203..c88787af78d 100644
--- a/admin/modules.php
+++ b/admin/modules.php
@@ -149,10 +149,10 @@
 
     foreach ($modules as $module) {
         $strmodulename = get_string("modulename", "$module->name");
-	// Deal with modules which are lacking the language string
-	if ($strmodulename == '[[modulename]]') {
-	    $strmodulename = $module->name;
-	}
+        // Deal with modules which are lacking the language string
+        if ($strmodulename == '[[modulename]]') {
+            $strmodulename = $module->name;
+        }
         $modulebyname[$strmodulename] = $module;
     }
     ksort($modulebyname);
diff --git a/blocks/admin/block_admin.php b/blocks/admin/block_admin.php
index 7a33c010318..0837740f0b0 100644
--- a/blocks/admin/block_admin.php
+++ b/blocks/admin/block_admin.php
@@ -113,7 +113,7 @@ class block_admin extends block_list {
             $fullname = fullname($USER, true);
             $editmyprofile = '<a title="'.$fullname.'" href="'.$CFG->wwwroot.'/user/edit.php?id='.$USER->id.'&amp;course='.$this->instance->pageid.'">'.get_string('editmyprofile').'</a>';
             if (empty($USER->description)) {
-            	//Accessibility: replace non-standard <blink> with CSS (<a> makes title visible in IE).
+                //Accessibility: replace non-standard <blink> with CSS (<a> makes title visible in IE).
                 $text = get_string('profile').' '.get_string('missingdescription');
                 $this->content->items[]= $editmyprofile.' <a title="'.$text.'" class="useredit blink">*<span class="accesshide">'.$text.'</span></a>';
             } else {
@@ -211,7 +211,7 @@ class block_admin extends block_list {
             $editmyprofile = '<a title="'.$fullname.'" href="'.$CFG->wwwroot.'/user/edit.php?id='.
                              $USER->id.'&amp;course='.$this->instance->pageid.'">'.get_string('editmyprofile').'</a>';
             if (empty($USER->description)) {
-            	//Accessibility: replace non-standard <blink> with CSS (<a> makes title visible in IE).
+                //Accessibility: replace non-standard <blink> with CSS (<a> makes title visible in IE).
                 $text = get_string('profile').' '.get_string('missingdescription');
                 $this->content->items[]= $editmyprofile.' <a title="'.$text.'" class="useredit blink">*<span class="accesshide">'.$text.'</span></a>';
             } else {
diff --git a/blocks/glossary_random/config_instance.html b/blocks/glossary_random/config_instance.html
index 43056d4f6b0..ed2e08f856e 100644
--- a/blocks/glossary_random/config_instance.html
+++ b/blocks/glossary_random/config_instance.html
@@ -12,26 +12,26 @@
 <td><input type="text" name="title" size="50" value="<?php p($this->config->title) ?>" /></td>
 </tr>
 
-<tr valign=top>	
+<tr valign=top>
 <td align=right><?php print_string("select_glossary","block_glossary_random") ?>:</td>
 <td><?php choose_from_menu($glossaries,"glossary",$this->config->glossary) ?></td>
 </tr>
 
-<tr valign=top>	
+<tr valign=top>
 <td align=right><?php print_string("refresh","block_glossary_random") ?>:</td>
 <td><input type="text" name="refresh" size="5" value="<?php p($this->config->refresh) ?>" /></td>
 </tr>
 
-<tr valign=top>	
-<td align=right><?php print_string("type","block_glossary_random") ?>:</td>	
+<tr valign=top>
+<td align=right><?php print_string("type","block_glossary_random") ?>:</td>
 <td><?php
      choose_from_menu($type, "type", $this->config->type, "");
      helpbutton("",get_string("type","block_glossary_random"),"moodle",true,false,get_string("typehelp","block_glossary_random"));
      ?></td>
 </tr> 
 
-<tr valign=top>	
-<td align=right><?php print_string("showconcept","block_glossary_random") ?>:</td>	
+<tr valign=top>
+<td align=right><?php print_string("showconcept","block_glossary_random") ?>:</td>
 <td>
 <input type="hidden" name="showconcept" value="0" />
 <input type="checkbox" name="showconcept" value="1" <?php if(!empty($this->config->showconcept)) echo 'checked="checked"'; ?> /></td>
diff --git a/blocks/online_users/block_online_users.php b/blocks/online_users/block_online_users.php
index a6ccfa36e0f..be9b96263e9 100644
--- a/blocks/online_users/block_online_users.php
+++ b/blocks/online_users/block_online_users.php
@@ -110,11 +110,11 @@ class block_online_users extends block_base {
         //Now, we have in users, the list of users to show
         //Because they are online
         if (!empty($users)) {
-        	//Accessibility: Don't want 'Alt' text for the user picture; DO want it for the envelope/message link (existing lang string).
-        	//Accessibility: Converted <div> to <ul>, inherit existing classes & styles.
-        	$this->content->text .= "<ul class='list'>\n";
+            //Accessibility: Don't want 'Alt' text for the user picture; DO want it for the envelope/message link (existing lang string).
+            //Accessibility: Converted <div> to <ul>, inherit existing classes & styles.
+            $this->content->text .= "<ul class='list'>\n";
             foreach ($users as $user) {
-            	$this->content->text .= '<li class="listentry">';
+                $this->content->text .= '<li class="listentry">';
                 $timeago = format_time(time() - max($user->timeaccess, $user->lastaccess)); //bruno to calculate correctly on frontpage 
                 $this->content->text .= print_user_picture($user->id, $this->instance->pageid, $user->picture, 16, true).' ';
                 $this->content->text .= '<a href="'.$CFG->wwwroot.'/user/view.php?id='.$user->id.'&amp;course='.$this->instance->pageid.'" title="'.$timeago.'">'.$user->fullname.'</a>';
diff --git a/blog/preferences.html b/blog/preferences.html
index 7d7805713d7..1195b6eacc0 100755
--- a/blog/preferences.html
+++ b/blog/preferences.html
@@ -8,7 +8,7 @@
 </tr>
 <tr>
     <td colspan="2" align="center">
-	<input type="submit" value="<?php print_string("savechanges"); ?>" />
+    <input type="submit" value="<?php print_string("savechanges"); ?>" />
     <input type="button" value="<?php print_string('cancel'); ?>" onclick="javascript:history.go(-1)" /></td>
 </tr>
 </table>
diff --git a/blog/preferences.php b/blog/preferences.php
index 07f51c6d159..5dc2fd75230 100755
--- a/blog/preferences.php
+++ b/blog/preferences.php
@@ -29,7 +29,7 @@
 
 /// If data submitted, then process and store.
 
-	if ($post = data_submitted()) {
+    if ($post = data_submitted()) {
 
         $pagesize = optional_param('pagesize', 10, PARAM_INT);
         if ($pagesize < 1 ) {
@@ -54,7 +54,7 @@
 
     print_simple_box_start('center', '', '');
 
-	include('./preferences.html');
+    include('./preferences.html');
     print_simple_box_end();
 
     print_footer();
diff --git a/calendar/lib.php b/calendar/lib.php
index 84c5e414e9c..fe5c126537b 100644
--- a/calendar/lib.php
+++ b/calendar/lib.php
@@ -241,9 +241,9 @@ function calendar_get_mini($courses, $groups, $users, $cal_month = false, $cal_y
             
             //Accessibility: functionality moved to calendar_get_popup.
             if($display->thismonth && $day == $d) {
-            	$popup = calendar_get_popup(true, $events[$eventid]->timestart, $popupcontent);
+                $popup = calendar_get_popup(true, $events[$eventid]->timestart, $popupcontent);
             } else {
-            	$popup = calendar_get_popup(false, $events[$eventid]->timestart, $popupcontent);
+                $popup = calendar_get_popup(false, $events[$eventid]->timestart, $popupcontent);
             } 
 
             // Class and cell content
@@ -279,15 +279,15 @@ function calendar_get_mini($courses, $groups, $users, $cal_month = false, $cal_y
         }
 
         // Special visual fx for today
-        //Accessibility: hidden text for today, and popup.	
+        //Accessibility: hidden text for today, and popup.
         if($display->thismonth && $day == $d) {
             $class .= ' today';
             $today = get_string('today', 'calendar').' '.userdate(time(), get_string('strftimedayshort'));
                         
             if(! isset($eventsbyday[$day])) {
-                $class .= ' eventnone';            	
-            	$popup = calendar_get_popup(true, false);
-            	$cell = '<a href="#" '.$popup.'>'.$day.'</a>';
+                $class .= ' eventnone';
+                $popup = calendar_get_popup(true, false);
+                $cell = '<a href="#" '.$popup.'>'.$day.'</a>';
             }
             $cell = '<span class="accesshide">'.$today.' </span>'.$cell;
         }
@@ -327,13 +327,13 @@ function calendar_get_popup($is_today, $event_timestart, $popupcontent='') {
     if (false === $event_timestart) {
         $popupcaption .= userdate(time(), get_string('strftimedayshort'));
         $popupcontent = get_string('eventnone', 'calendar');
-          	
+
     } else {
         $popupcaption .= get_string('eventsfor', 'calendar', userdate($event_timestart, get_string('strftimedayshort')));
     }
     $popupcontent = str_replace("'", "\'", htmlspecialchars($popupcontent));
     $popup = 'onmouseover="return overlib(\''.$popupcontent.'\', CAPTION, \''.$popupcaption.'\');" onmouseout="return nd();"';
-    return $popup;	
+    return $popup;
 }
 
 function calendar_get_upcoming($courses, $groups, $users, $daysinfuture, $maxevents, $fromtime=0) {
diff --git a/course/import/activities/mod.php b/course/import/activities/mod.php
index b204685b64d..8cdcd09fa69 100644
--- a/course/import/activities/mod.php
+++ b/course/import/activities/mod.php
@@ -15,7 +15,7 @@
     $strimport = get_string("importdata");
  
     $tcourseids = '';
-  	 
+ 
     if ($teachers = get_records_select('user_teachers', "userid = $USER->id AND editall = 1",'','id,course')) {
         foreach ($teachers as $teacher) {
             if ($teacher->course != $course->id && $teacher->course != SITEID){
@@ -25,7 +25,7 @@
     }
 
     $taught_courses = array();
-  	if (!empty($tcourseids)) {
+    if (!empty($tcourseids)) {
         $tcourseids = substr($tcourseids,0,-1);
         $taught_courses = get_records_list('course', 'id', $tcourseids);
     }
diff --git a/course/importstudents.html b/course/importstudents.html
index ed9b879dd66..92c4c1c8207 100644
--- a/course/importstudents.html
+++ b/course/importstudents.html
@@ -53,7 +53,7 @@
                   }
                   else {
                       foreach ($courses as $course) {
-   	                  echo "<option value=\"$course->id\">".course_format_name($course,60)."</option>\n";
+                      echo "<option value=\"$course->id\">".course_format_name($course,60)."</option>\n";
                       }
                   }
               }
diff --git a/course/request.php b/course/request.php
index d46b100c25b..a4d9fd2a36a 100644
--- a/course/request.php
+++ b/course/request.php
@@ -36,7 +36,7 @@
             $form = stripslashes_safe($form);
         }
 
-    	// !! no db access using data from $form beyond this point !!
+        // !! no db access using data from $form beyond this point !!
     }
 
 //    print_simple_box(get_string('courserequestintro'),'center');
diff --git a/enrol/authorize/db/postgres7.php b/enrol/authorize/db/postgres7.php
index 6ff76a047e4..a04f167515e 100644
--- a/enrol/authorize/db/postgres7.php
+++ b/enrol/authorize/db/postgres7.php
@@ -93,10 +93,10 @@ function enrol_authorize_upgrade($oldversion=0) {
     }
 
     if ($oldversion < 2006010200) { // rename an_review_day
-    	if (isset($CFG->an_review_day)) {
-    	    set_config('an_capture_day', $CFG->an_review_day);
-    	    delete_records('config', 'name', 'an_review_day');
-    	}
+        if (isset($CFG->an_review_day)) {
+            set_config('an_capture_day', $CFG->an_review_day);
+            delete_records('config', 'name', 'an_review_day');
+        }
     }
 
     if ($oldversion < 2006020100) { // rename an_cutoff_hour and an_cutoff_min to an_cutoff
@@ -115,11 +115,6 @@ function enrol_authorize_upgrade($oldversion=0) {
         table_column('enrol_authorize', 'transid', 'transid', 'integer', '10', 'unsigned', '0', 'not null');
     }
 
-    if ($oldversion < 2006050400) { // Create transid indexes for backup & restore speed.
-        execute_sql("CREATE INDEX {$CFG->prefix}enrol_authorize_transid_idx ON {$CFG->prefix}enrol_authorize(transid);", false);
-        execute_sql("CREATE INDEX {$CFG->prefix}enrol_authorize_refunds_transid_idx ON {$CFG->prefix}enrol_authorize_refunds(transid);", false);
-    }
-
     return $result;
 }
 
diff --git a/enrol/imsenterprise/enrol.php b/enrol/imsenterprise/enrol.php
index d32ba81bdf1..1d9e3d502b7 100644
--- a/enrol/imsenterprise/enrol.php
+++ b/enrol/imsenterprise/enrol.php
@@ -529,7 +529,7 @@ function process_person_tag($tagcontents){
     }
     if($CFG->enrol_imssourcedidfallback && trim($person->username)==''){
       // This is the point where we can fall back to useing the "sourcedid" if "userid" is not supplied
-	 // NB We don't use an "elseif" because the tag may be supplied-but-empty
+      // NB We don't use an "elseif" because the tag may be supplied-but-empty
         $person->username = $person->idnumber;
     }
     if(preg_match('{<email>(.*?)</email>}is', $tagcontents, $matches)){
diff --git a/enrol/imsenterprise/importnow.php b/enrol/imsenterprise/importnow.php
index cd8a0c52898..9efc92f6e40 100644
--- a/enrol/imsenterprise/importnow.php
+++ b/enrol/imsenterprise/importnow.php
@@ -3,20 +3,20 @@ require_once(dirname(dirname(dirname(__FILE__))) . '/config.php');
 require_login();
 
 if (!$site = get_site()) {
-	redirect("index.php");
+    redirect("index.php");
 }
 
 if (!isadmin()) {
-	error("Only the admin can use this page");
+    error("Only the admin can use this page");
 }
 
 /// get language strings
 $str = get_strings(array('enrolments', 'users', 'administration', 'settings'));
 
 print_header("$site->shortname: $str->enrolments", "$site->fullname",
-			  "<a href=\"../../admin/index.php\">$str->administration</a> -> 
-			   <a href=\"../../admin/users.php\">$str->users</a> -> 
-			   $str->enrolments -> IMS import");
+              "<a href=\"../../admin/index.php\">$str->administration</a> -> 
+               <a href=\"../../admin/users.php\">$str->users</a> -> 
+               $str->enrolments -> IMS import");
 
 require_once('enrol.php');
 
diff --git a/filter/tex/latex.php b/filter/tex/latex.php
index e9a65179fc1..d00c94b3a10 100644
--- a/filter/tex/latex.php
+++ b/filter/tex/latex.php
@@ -150,7 +150,7 @@
             unlink( "{$this->temp_dir}/$filename.gif" );
             unlink( "{$this->temp_dir}/$filename.aux" );
             unlink( "{$this->temp_dir}/$filename.log" );
-	        return;
+            return;
         }
 
     }
diff --git a/lib/db/mysql.php b/lib/db/mysql.php
index 1eecbde7e99..f5ddb843d15 100644
--- a/lib/db/mysql.php
+++ b/lib/db/mysql.php
@@ -1542,7 +1542,7 @@ function main_upgrade($oldversion=0) {
           `uniquelogins` int(10) unsigned NOT NULL default 0,
           PRIMARY KEY (`id`),
           KEY `courseid` (`courseid`),
-          KEY `timeend` (`timeend`)	 
+          KEY `timeend` (`timeend`)
        );");
 
         modify_database("","CREATE TABLE prefix_stats_weekly (
@@ -1561,7 +1561,7 @@ function main_upgrade($oldversion=0) {
           `uniquelogins` int(10) unsigned NOT NULL default 0,
           PRIMARY KEY (`id`),
           KEY `courseid` (`courseid`),
-          KEY `timeend` (`timeend`)	 
+          KEY `timeend` (`timeend`)
        );");
 
         modify_database("","CREATE TABLE prefix_stats_monthly (
@@ -1580,7 +1580,7 @@ function main_upgrade($oldversion=0) {
           `uniquelogins` int(10) unsigned NOT NULL default 0,
           PRIMARY KEY (`id`),
           KEY `courseid` (`courseid`),
-          KEY `timeend` (`timeend`)	 
+          KEY `timeend` (`timeend`)
        );");
 
         modify_database("","CREATE TABLE prefix_stats_user_daily (
@@ -1596,7 +1596,7 @@ function main_upgrade($oldversion=0) {
           KEY `courseid` (`courseid`),
           KEY `userid` (`userid`),
           KEY `roleid` (`roleid`),
-          KEY `timeend` (`timeend`)	
+          KEY `timeend` (`timeend`)
        );");
 
         modify_database("","CREATE TABLE prefix_stats_user_weekly (
@@ -1612,7 +1612,7 @@ function main_upgrade($oldversion=0) {
           KEY `courseid` (`courseid`),
           KEY `userid` (`userid`),
           KEY `roleid` (`roleid`),
-          KEY `timeend` (`timeend`)	
+          KEY `timeend` (`timeend`)
        );");
 
         modify_database("","CREATE TABLE prefix_stats_user_monthly (
@@ -1628,7 +1628,7 @@ function main_upgrade($oldversion=0) {
           KEY `courseid` (`courseid`),
           KEY `userid` (`userid`),
           KEY `roleid` (`roleid`),
-          KEY `timeend` (`timeend`)	
+          KEY `timeend` (`timeend`)
        );");
          
     }
diff --git a/lib/db/mysql.sql b/lib/db/mysql.sql
index 7292c32b742..016ea654e6f 100644
--- a/lib/db/mysql.sql
+++ b/lib/db/mysql.sql
@@ -89,7 +89,7 @@ CREATE TABLE `prefix_course` (
   PRIMARY KEY  (`id`),
   KEY `category` (`category`),
   KEY `idnumber` (`idnumber`),
-  KEY `shortname` (`shortname`)	 
+  KEY `shortname` (`shortname`)
 ) TYPE=MyISAM;
 # --------------------------------------------------------
 
@@ -776,7 +776,7 @@ CREATE TABLE prefix_stats_weekly (
    `uniquelogins` int(10) unsigned NOT NULL default 0,
    PRIMARY KEY (`id`),
    KEY `courseid` (`courseid`),
-   KEY `timeend` (`timeend`)	 
+   KEY `timeend` (`timeend`)
 );
 
 CREATE TABLE prefix_stats_monthly (
@@ -795,7 +795,7 @@ CREATE TABLE prefix_stats_monthly (
    `uniquelogins` int(10) unsigned NOT NULL default 0,
    PRIMARY KEY (`id`),
    KEY `courseid` (`courseid`),
-   KEY `timeend` (`timeend`)	 
+   KEY `timeend` (`timeend`)
 );
 
 CREATE TABLE prefix_stats_user_daily (
@@ -811,7 +811,7 @@ CREATE TABLE prefix_stats_user_daily (
    KEY `courseid` (`courseid`),
    KEY `userid` (`userid`),
    KEY `roleid` (`roleid`),
-   KEY `timeend` (`timeend`)	
+   KEY `timeend` (`timeend`)
 );
 
 CREATE TABLE prefix_stats_user_weekly (
@@ -827,7 +827,7 @@ CREATE TABLE prefix_stats_user_weekly (
    KEY `courseid` (`courseid`),
    KEY `userid` (`userid`),
    KEY `roleid` (`roleid`),
-   KEY `timeend` (`timeend`)	
+   KEY `timeend` (`timeend`)
 );
 
 CREATE TABLE prefix_stats_user_monthly (
@@ -843,7 +843,7 @@ CREATE TABLE prefix_stats_user_monthly (
    KEY `courseid` (`courseid`),
    KEY `userid` (`userid`),
    KEY `roleid` (`roleid`),
-   KEY `timeend` (`timeend`)	
+   KEY `timeend` (`timeend`)
 );
 
 #
diff --git a/lib/db/postgres7.php b/lib/db/postgres7.php
index 60c823c6f92..58e4bf5dcdf 100644
--- a/lib/db/postgres7.php
+++ b/lib/db/postgres7.php
@@ -881,9 +881,9 @@ function main_upgrade($oldversion=0) {
     if ($oldversion < 2005012500) { // add new table for meta courses.
         /*
         modify_database("","CREATE TABLE prefix_meta_course (
-	         id SERIAL primary key,
-	         parent_course integer NOT NULL,
-	         child_course integer NOT NULL
+             id SERIAL primary key,
+             parent_course integer NOT NULL,
+             child_course integer NOT NULL
              );");
 
         modify_database("","CREATE INDEX prefix_meta_course_parent_idx ON prefix_meta_course (parent_course);");
@@ -897,9 +897,9 @@ function main_upgrade($oldversion=0) {
         execute_sql("ALTER TABLE {$CFG->prefix}course DROP COLUMN meta_course",false); // drop silently
         
         modify_database("","CREATE TABLE prefix_course_meta (
-	         id SERIAL primary key,
-	         parent_course integer NOT NULL,
-	         child_course integer NOT NULL
+             id SERIAL primary key,
+             parent_course integer NOT NULL,
+             child_course integer NOT NULL
              );");
 
         modify_database("","CREATE INDEX prefix_course_meta_parent_idx ON prefix_course_meta (parent_course);");
diff --git a/lib/db/postgres7.sql b/lib/db/postgres7.sql
index 6641a3ceca4..99c3723bfb4 100644
--- a/lib/db/postgres7.sql
+++ b/lib/db/postgres7.sql
@@ -86,9 +86,9 @@ CREATE TABLE prefix_course_display (
 CREATE INDEX prefix_course_display_courseuserid_idx ON prefix_course_display (course,userid);
 
 CREATE TABLE prefix_course_meta (
-	id SERIAL primary key,
-	parent_course integer NOT NULL,
-	child_course integer NOT NULL
+    id SERIAL primary key,
+    parent_course integer NOT NULL,
+    child_course integer NOT NULL
 );
 
 CREATE INDEX prefix_course_meta_parent_idx ON prefix_course_meta (parent_course);
diff --git a/lib/filterlib.php b/lib/filterlib.php
index 00972bff209..a57070367c7 100644
--- a/lib/filterlib.php
+++ b/lib/filterlib.php
@@ -110,7 +110,7 @@ function filter_phrases ($text, &$link_array, $ignoretagsopen=NULL, $ignoretagsc
         }
 
     /// All this work has to be done ONLY it it hasn't been done before
-	if (!$linkobject->work_calculated) {
+    if (!$linkobject->work_calculated) {
             if (!isset($linkobject->hreftagbegin) or !isset($linkobject->hreftagend)) {
                 $linkobject->work_hreftagbegin = '<span class="highlight"';
                 $linkobject->work_hreftagend   = '</span>';
diff --git a/lib/statslib.php b/lib/statslib.php
index 8b8a5ebb9c0..2361056a54c 100644
--- a/lib/statslib.php
+++ b/lib/statslib.php
@@ -846,7 +846,7 @@ function stats_fix_zeros($stats,$timeafter,$timestr,$line2=true,$line3=false) {
 
     $timestr = str_replace('user_','',$timestr); // just in case.
     $fun = 'stats_get_base_'.$timestr;
-	
+    
     $now = $fun();
 
     $times = array();
@@ -907,7 +907,7 @@ function stats_check_uptodate($courseid=0) {
     global $CFG;
 
     if (empty($courseid)) {
-	$courseid = SITEID;
+        $courseid = SITEID;
     }
 
     $latestday = stats_get_start_from('daily');
diff --git a/lib/weblib.php b/lib/weblib.php
index 41ec08cdc8d..56cc2a3ecf5 100644
--- a/lib/weblib.php
+++ b/lib/weblib.php
@@ -285,7 +285,7 @@ function match_referer($goodreferer = '') {
     if (empty($goodreferer)) {
         $goodreferer = qualified_me();
         // try to remove everything after ? because POST url may contain GET parameters (SID rewrite, etc.)
-	    $pos = strpos($goodreferer, '?');
+        $pos = strpos($goodreferer, '?');
         if ($pos !== FALSE) {
             $goodreferer = substr($goodreferer, 0, $pos);
         }
@@ -2460,8 +2460,8 @@ function print_navigation ($navigation) {
 
    if ($navigation) {
        //Accessibility: breadcrumb links now in a list, &raquo; replaced with image.
-   	   $nav_text = get_string('youarehere','access');
-   	   echo '<h2 class="accesshide">'.$nav_text.",</h2><ul>\n";
+       $nav_text = get_string('youarehere','access');
+       echo '<h2 class="accesshide">'.$nav_text.",</h2><ul>\n";
        if (! $site = get_site()) {
            $site->shortname = get_string('home');
        }
diff --git a/login/index.php b/login/index.php
index d287cf2e79c..50a091b4380 100644
--- a/login/index.php
+++ b/login/index.php
@@ -79,10 +79,10 @@
         // Handles the case of another Moodle site linking into a page on this site
         include($CFG->dirroot.'/login/weblinkauth.php');
         if (function_exists(weblink_auth)) {
-        	$user = weblink_auth($SESSION->wantsurl);
+            $user = weblink_auth($SESSION->wantsurl);
         }
         if ($user) {
-        	$frm->username = $user->username;
+            $frm->username = $user->username;
         } else {
             $frm = data_submitted($loginurl);
         }
diff --git a/mod/data/field/picture/mod.html b/mod/data/field/picture/mod.html
index a5ef9274a08..5def7328c1a 100755
--- a/mod/data/field/picture/mod.html
+++ b/mod/data/field/picture/mod.html
@@ -52,7 +52,7 @@
             <?php
                 $course->maxbytes = get_field('course', 'maxbytes', 'id', $this->data->course);
                 $choices = get_max_upload_sizes($CFG->maxbytes, $course->maxbytes);
-        	    choose_from_menu ($choices, "param3", $this->field->param3, "");
+                choose_from_menu ($choices, "param3", $this->field->param3, "");
             ?>
         </td>
     </tr>