Index: category.inc
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/category/category.inc,v
retrieving revision 1.42.2.13
diff -u -r1.42.2.13 category.inc
--- category.inc	10 Jul 2006 09:02:10 -0000	1.42.2.13
+++ category.inc	18 Jul 2006 09:34:12 -0000
@@ -25,7 +25,7 @@
 function category_get_category($cid, $reset = FALSE) {
   static $categories;
 
-  if (!is_numeric($cid)) {
+  if (!is_numeric($cid) or $cid == 0) {
     return FALSE;
   }
 
@@ -39,7 +39,7 @@
     }
   }
 
-  return $categories[$cid];
+  return drupal_clone($categories[$cid]);
 }
 
 /**