Index: trunk/kernel/include/customfield.php
===================================================================
diff -u -r4077 -r4330
--- trunk/kernel/include/customfield.php	(.../customfield.php)	(revision 4077)
+++ trunk/kernel/include/customfield.php	(.../customfield.php)	(revision 4330)
@@ -67,22 +67,28 @@
 {
     var $Type;
 
-    function clsCustomFieldList($type=-1,$table="CustomField")
+    function clsCustomFieldList($type = -1, $table = 'CustomField')
     {
         $this->clsItemCollection();
-        $this->Type=$type;
-        $this->classname = "clsCustomField";
-        if($table=="CustomField")
-          $table = GetTablePrefix().$table;
+        $this->Type = $type;
+        $this->classname = 'clsCustomField';
+        if ($table == 'CustomField') {
+			$table = GetTablePrefix().$table;
+        }
+        
         $this->SourceTable = $table;
-        if($this->Type>0)
-          $this->LoadFields();
+        if ($this->Type > 0) {
+			$this->LoadFields();
+        }
     }
 
     function LoadFields()
     {
         $this->Clear();
-        $sql = "SELECT * FROM ".$this->SourceTable." WHERE Type=".$this->Type." ORDER BY DisplayOrder DESC, CustomFieldId ASC";
+        $sql = 'SELECT *
+        		FROM '.$this->SourceTable.'
+        		WHERE Type = '.$this->Type.' AND IsSystem = 0
+        		ORDER BY DisplayOrder DESC, CustomFieldId ASC';
         if($this->debuglevel > 1) 
         	echo $sql."<br>\n";
         $rs = $this->adodbConnection->Execute($sql);
@@ -125,20 +131,17 @@
     
     function GetFieldUIList($GeneralTab=FALSE)
     {
-      $ret = new clsConfigAdmin();
-      
-      if($this->NumItems()>0)
-      {
-        foreach($this->Items as $field)
-        {
-      	  if($GeneralTab==TRUE && $field->Get("OnGeneralTab")==1 || !$GeneralTab)
-      	  {
-      	    $ui = $field->GetAdminUI();
-      	    array_push($ret->Items,$ui);
-      	  }
-        }
-      }
-      return $ret;	
+    	$ret = new clsConfigAdmin();
+
+    	if ($this->NumItems() > 0) {
+    		foreach ($this->Items as $field) {
+    			if ($GeneralTab == true && $field->Get('OnGeneralTab') == 1 || !$GeneralTab) {
+    				$ui = $field->GetAdminUI();
+    				array_push($ret->Items,$ui);
+    			}
+    		}
+    	}
+    	return $ret;
     }
 
     function GetFieldNames()