Index: categories_event_handler.php
===================================================================
--- categories_event_handler.php	(revision 14318)
+++ categories_event_handler.php	(working copy)
@@ -119,6 +119,15 @@
 				return $perm_helper->finalizePermissionCheck($event, $perm_value);
 			}
 
+			if ($event->Name == 'OnRecalculatePriorities') {
+				$perm_helper =& $this->Application->recallObject('PermissionsHelper');
+				/* @var $perm_helper kPermissionsHelper */
+
+				$category_id = $this->Application->GetVar('m_cat_id');
+
+				return $perm_helper->AddCheckPermission($category_id, $event->Prefix) || $perm_helper->ModifyCheckPermission(0, $category_id, $event->Prefix);
+			}
+
 			if ($event->Name == 'OnPasteClipboard') {
 				// forces permission check to work by current category for "Paste In Category" operation
 				$category_id = $this->Application->GetVar('m_cat_id');