Index: trunk/admin/category/category_maint.php
===================================================================
diff -u -r952 -r2536
--- trunk/admin/category/category_maint.php	(.../category_maint.php)	(revision 952)
+++ trunk/admin/category/category_maint.php	(.../category_maint.php)	(revision 2536)
@@ -14,7 +14,7 @@
 ##############################################################
 if(!defined('CACHE_PERM_CHUNK_SIZE'))define('CACHE_PERM_CHUNK_SIZE',30);
 
-if(!strlen($pathtoroot))
+if( !(isset($pathtoroot) && $pathtoroot) )
 {
   	$path = dirname(realpath(__FILE__));
   	if( strlen($path) )