Didn't work like no menu bar even with the default skin? Well, it's probably not a skin problem, at least. *g* I shouldn't have posted. But sometimes simple fixes like that do the trick. I'm afraid I can't really help but hopefully somebody will come along who can.
You don't happen to have another moz-type browser do you? Sometimes plugins and other browsers can get their wires crossed. I don't know - if it was me, I'd just start poking through configuration files looking for anything that looked screwed up, since the install probably screwed something up in there. If it works in root, compare root's configuration to your user's. Or possibly even - well, again, I'm not recommending this but saying what I might do in my infinite lunacy - try copying root's configs into my user directory and changing the permissions and ownership, after backing up the originals under another filename, so I could change it back - and see if switching any of those fixed it.