Index: blocklib.php
===================================================================
--- blocklib.php	(revision 1073)
+++ blocklib.php	(working copy)
@@ -743,10 +743,8 @@
     public function add_blocks($blocks, $pagetypepattern = NULL, $subpagepattern = NULL, $showinsubcontexts=false, $weight=0) {
         $this->add_regions(array_keys($blocks));
         foreach ($blocks as $region => $regionblocks) {
-            $weight = 0;
-            foreach ($regionblocks as $blockname) {
+            foreach ($regionblocks as $weight=>$blockname) {
                 $this->add_block($blockname, $region, $weight, $showinsubcontexts, $pagetypepattern, $subpagepattern);
-                $weight += 1;
             }
         }
     }