- Patch #771036 by Gábor Hojtsy: overlay overwrites existing target attribute.

modules/overlay/overlay-parent.js

@@ -752,7 +752,9 @@ Drupal.overlay.clickHandler = function (event) {
     else if ($target.get(0).hostname != window.location.hostname) {
       // Add a target attribute to the clicked link. This is being picked up by
       // the default action handler.
-      $target.attr('target', '_new');
+      if (!$target.attr('target')) {
+        $target.attr('target', '_new');
+      }
     }
     // Non-admin links should close the overlay and open in the main window.
     // Only handle them if the overlay is open and the clicked link is inside