I have had the same problem as you two. Unfortunately, i can't find any solution but uninstalling the existing Firefox on your system (performing a clean installation, i mean -- you have to completely remove the Firefox user profile or else the error won't go away -- The profile will be located within your documents and settings/<your user name>/Application Data/mozilla) then re-install firefox again. If it ask you to import IE profiles on the startup means it's work.
-- Download does not work in Firefox / Edgy https://launchpad.net/bugs/73322 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs