Can't use ajax functionality when searching a project on the bugs front page!!!

After choosing one project on the bugs front page (https://bugs.launchpad.net/) and clicking the Choose... the menu for searching appears, and you can even give a search in it, but you cannot choose the package it founded from its list, you cannot even close that menu. I'm using FF 2.0.6 and in the error console I receive the following 2 errors:
1:---------------------------------------
Error: uncaught exception: Security Error: Content at https://bugs.launchpad.net/ may not load data from https://bugs.edge.launchpad.net/+dims?w=1260&h=574.
2:---------------------------------------
Error: uncaught exception: Permission denied to get property HTMLDocument.getElementById

This happens only on the bugs front page. I've deleted cache and fully reloaded the page. Hope I'm wrong :(