This problem is actually component=mail&browser, but I'm not sure if we can choose a component in bugzilla to reflect that. Steps to reproduce: Start mail. See no menus. Tested on 5.2 Red Hat Linux. Buttons all seem to work, if that's any consolation. We can't do a lot of our necessary testing in this condition, so I think it should be a blocker.
This is probably related to the packaging snafu this morning. Rebuilding now.
*** This bug has been marked as a duplicate of 7412 ***
Marking as verified dupe.