I've seen this problem as well when configuring my nvidia graphic card, restarting X solves the problem. Do you have such a card?
** Changed in: thunar (Ubuntu) Status: Unconfirmed => Needs Info -- wrong font in thunar https://launchpad.net/bugs/81175 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs