TMP works fine here, and the FF icon is correct. Maybe an issue with an Upgrade vs a fresh install of Ubuntu 10.04. In any event, it should be solvable. :-)
I'm not used to the Close, Minimize, Maximize buttons being on the left either, but I haven't looked at changing it.
I hope it works out well for you. OS changes are always painful, no matter how good they are.
Hang in there!
Cheers,
Scott.