My UI is hosed... Two identical users logged in, etc. Help

[Future Blues]

Anybody ever seen anything like this? Leopard's window manager seems to have gone crazy and I'm seeing weird things in my menus (like the apparent hotkeys for my user accounts in every menu twice...) There are extra black boxes around things like the red close button in windows and around documents on the desktop and in pretty much every window somewhere, but I don't know why this is happening.

A restart hasn't fixed this and force quitting finder and restarting it doesn't seem to do anything either.

I feel like this might be somehow connected to iTunes 8, as I had a kernal panic almost immediately after installing it (from disconnecting a shuffle from the USB port) and since then, besides some light iWorks use and whatnot, there's not much I've really done on my computer. It started this morning and I'm sort of at a loss, since I've never seen anything like this before.

Any ideas?

 

[TEG]

It looks like a keyboard or Universal Access problem. Check to make sure you don't have extra UA options turned on. Also try repairing permissions. If that doesn't work, you may need to do an "Archive and Install" of OS X.

TEG

 

[motulist]

Also try repairing the disk through Disk Utility. If you have Disk Warrior, it'd also be good to run that because sometimes it picks up major errors that solve my problems even though Disk Utility says the disk seems to be okay.

 

[Future Blues]

While I was verifying permissions, the strange behavior just disappeared after it had been happening all morning.

Hopefully it won't return. =/