diff --git a/admin/blocks.php b/admin/blocks.php
index b1c53df11f4..34e8e4e0e00 100644
--- a/admin/blocks.php
+++ b/admin/blocks.php
@@ -131,12 +131,25 @@
     $table->setup();
     $tablerows = array();
 
+    // Sort blocks using current locale.
+    $blocknames = array();
     foreach ($blocks as $blockid=>$block) {
         $blockname = $block->name;
+        if (file_exists("$CFG->dirroot/blocks/$blockname/block_$blockname.php")) {
+            $blocknames[$blockid] = get_string('pluginname', 'block_'.$blockname);
+        } else {
+            $blocknames[$blockid] = $blockname;
+        }
+    }
+    collatorlib::asort($blocknames);
+
+    foreach ($blocknames as $blockid=>$strblockname) {
+        $block = $blocks[$blockid];
+        $blockname = $block->name;
 
         if (!file_exists("$CFG->dirroot/blocks/$blockname/block_$blockname.php")) {
             $blockobject  = false;
-            $strblockname = '<span class="notifyproblem">'.$blockname.' ('.get_string('missingfromdisk').')</span>';
+            $strblockname = '<span class="notifyproblem">'.$strblockname.' ('.get_string('missingfromdisk').')</span>';
             $plugin = new stdClass();
             $plugin->version = $block->version;
 
@@ -151,7 +164,6 @@
                 $incompatible[] = $block;
                 continue;
             }
-            $strblockname = get_string('pluginname', 'block_'.$blockname);
         }
 
         $delete = '<a href="blocks.php?delete='.$blockid.'&amp;sesskey='.sesskey().'">'.$strdelete.'</a>';
@@ -222,12 +234,7 @@
             $delete,
             $settings
         );
-        $tablerows[] = array(strip_tags($strblockname), $row); // first element will be used for sorting
-    }
-
-    collatorlib::asort($tablerows);
-    foreach ($tablerows as $row) {
-        $table->add_data($row[1]);
+        $table->add_data($row);
     }
 
     $table->print_html();
diff --git a/lib/tests/textlib_test.php b/lib/tests/textlib_test.php
index 116f313c9a5..261cfddd7fc 100644
--- a/lib/tests/textlib_test.php
+++ b/lib/tests/textlib_test.php
@@ -471,6 +471,12 @@ class collatorlib_testcase extends basic_testcase {
         $this->assertSame(array_keys($arr), array(0, 'b', 1));
         $this->assertTrue($result);
 
+        // test sorting of array of arrays - first element should be used for actual comparison
+        $arr = array(0=>array('bb', 'z'), 1=>array('ab', 'a'), 2=>array('zz', 'x'));
+        $result = collatorlib::asort($arr, collatorlib::SORT_REGULAR);
+        $this->assertSame(array_keys($arr), array(1, 0, 2));
+        $this->assertTrue($result);
+
         $arr = array('a' => 'áb', 'b' => 'ab', 1 => 'aa', 0=>'cc', 'x' => 'Áb',);
         $result = collatorlib::asort($arr);
         $this->assertSame(array_values($arr), array('aa', 'ab', 'áb', 'Áb', 'cc'), $this->error);
diff --git a/lib/textlib.class.php b/lib/textlib.class.php
index 540e4a4946a..77fafc1278e 100644
--- a/lib/textlib.class.php
+++ b/lib/textlib.class.php
@@ -616,7 +616,7 @@ class textlib {
  * @license   http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  */
 class collatorlib {
-    /** @const compare items as strings, equivalent to Collator::SORT_REGULAR */
+    /** @const compare items using general PHP comparison, equivalent to Collator::SORT_REGULAR, this may bot be locale aware! */
     const SORT_REGULAR = 0;
 
     /** @const compare items as strings, equivalent to Collator::SORT_STRING */