Index: trunk/kernel/include/itemtypes.php
===================================================================
diff -u -r3043 -r4594
--- trunk/kernel/include/itemtypes.php	(.../itemtypes.php)	(revision 3043)
+++ trunk/kernel/include/itemtypes.php	(.../itemtypes.php)	(revision 4594)
@@ -70,9 +70,11 @@
 
     function LoadAllItems()
     {
-        $t = $this->SourceTable;
-        $m = GetTablePrefix()."Modules";
-        $sql = "SELECT * FROM $t INNER JOIN $m ON ($t.Module=$m.Name) WHERE Loaded=1 ORDER BY LoadOrder";        
+        $sql = 'SELECT *
+        		FROM '.$this->SourceTable.' it
+        		INNER JOIN '.TABLE_PREFIX.'Modules m ON it.Module = m.Name
+        		WHERE (m.Loaded = 1) AND (LENGTH(it.ClassName) > 0)
+        		ORDER BY m.LoadOrder';
         $this->Query_Item($sql);
     }