Index: modules/overlay/overlay.module
===================================================================
RCS file: /cvs/drupal/drupal/modules/overlay/overlay.module,v
retrieving revision 1.8
diff -u -p -r1.8 overlay.module
--- modules/overlay/overlay.module	18 Jan 2010 17:12:04 -0000	1.8
+++ modules/overlay/overlay.module	4 Feb 2010 14:31:24 -0000
@@ -84,7 +84,8 @@ function overlay_init() {
       // Unset the render parameter to avoid it being included in URLs on the page.
       unset($_GET['render']);
     }
-    else {
+    // Do not enable the overlay if we already are on an admin page.
+    else if (!path_is_admin(current_path())) {
       // Otherwise add overlay parent code and our behavior.
       overlay_set_mode('parent');
     }