Index: sections.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/sections/sections.module,v
retrieving revision 1.21.2.26
diff -u -r1.21.2.26 sections.module
--- sections.module	14 Dec 2009 21:09:44 -0000	1.21.2.26
+++ sections.module	19 Dec 2009 23:20:03 -0000
@@ -262,7 +262,7 @@
         // When $row->visibility has a value of 0, the block is displayed on
         // all pages except those listed in $row->path. When set to 1, it
         // is displayed only on those pages listed in $row->path.
-        if ($page_match = !($row->visibility xor $page_match)) {
+        if ($page_match = !($row->visibility xor $page_match) && !($path == 'admin/build/block')) {
           return $row;
         }
       }