Index: branches/unlabeled/unlabeled-1.64.2/kernel/units/general/cat_event_handler.php
===================================================================
diff -u -r5620 -r5644
--- branches/unlabeled/unlabeled-1.64.2/kernel/units/general/cat_event_handler.php	(.../cat_event_handler.php)	(revision 5620)
+++ branches/unlabeled/unlabeled-1.64.2/kernel/units/general/cat_event_handler.php	(.../cat_event_handler.php)	(revision 5644)
@@ -55,17 +55,19 @@
 	 */
 	function OnCopy(&$event)
 	{
+		$this->Application->RemoveVar('clipboard');
 		$clipboard_helper =& $this->Application->recallObject('ClipboardHelper');
 		$clipboard_helper->setClipboard($event, 'copy', $this->StoreSelectedIDs($event));
 	}
-	
+
 	/**
 	 * Add selected items to clipboard with mode = CUT
 	 *
 	 * @param kEvent $event
 	 */
 	function OnCut(&$event)
 	{
+		$this->Application->RemoveVar('clipboard');
 		$clipboard_helper =& $this->Application->recallObject('ClipboardHelper');
 		$clipboard_helper->setClipboard($event, 'cut', $this->StoreSelectedIDs($event));
 	}
@@ -80,9 +82,9 @@
 		if ($this->Application->CheckPermission('SYSTEM_ACCESS.READONLY', 1)) {
 			return;
 		}
-		
+
 		$clipboard_data = $event->getEventParam('clipboard_data');
-		
+
 		if (!$clipboard_data['cut'] && !$clipboard_data['copy']) {
 			return false;
 		}
@@ -91,7 +93,7 @@
 			$temp =& $this->Application->recallObject($event->getPrefixSpecial().'_TempHandler', 'kTempTablesHandler');
 			$temp->CloneItems($event->Prefix, $event->Special, $clipboard_data['copy']);
 		}
-		
+
 		if ($clipboard_data['cut']) {
 			$object =& $this->Application->recallObject($event->getPrefixSpecial().'.item', $event->Prefix, Array('skip_autoload' => true));
 
@@ -476,7 +478,7 @@
 			return;
 		}
 		$click_field = $property_map['ClickField'];
-		
+
 		$object =& $event->getObject();
 		if( $this->Application->IsAdmin() && ($this->Application->GetVar($click_field.'_original') !== false) &&
 			floor($this->Application->GetVar($click_field.'_original')) != $object->GetDBField($click_field) )
@@ -1674,16 +1676,16 @@
 	function cacheItemOwner(&$event, $id_field, $cached_field)
 	{
 		$object =& $event->getObject();
-		
+
 		$user_id = $object->GetDBField($id_field);
 		$options = $object->GetFieldOptions($id_field);
 		if (isset($options['options'][$user_id])) {
 			$object->SetDBField($cached_field, $options['options'][$user_id]);
 		}
 		else {
 			$id_field = $this->Application->getUnitOption('u', 'IDField');
-			$table_name = $this->Application->getUnitOption('u', 'TableName');	
-		
+			$table_name = $this->Application->getUnitOption('u', 'TableName');
+
 			$sql = 'SELECT Login
 					FROM '.$table_name.'
 					WHERE '.$id_field.' = '.$user_id;