NIKLAS BRUNBERG Yes, I have seen that happen once in a while, looks like the web kit engine did not load the css file. I have no real idea on how to fix it. Try updating Safari (if you have not already) and install a fresh copy of the style. You might also try logging out and in again (or restarting your computer) to reload the web kit in Mac OS X:s memory.
Please tell me if you still suffer from this problem or if you managed to solve it.
(Version 1.2.2)