All,
We've upgraded the forums to the most recently published version. We deemed this necessary in order to get rid of known security vulnerabilities, and to improve our ability to prevent spam.
However, this has had some side effects on some of the older components. One casualty is the normal theme, which was last updated in 2007. If you want to switch off of that theme, follow these steps:
1) Go to your profile
2) Go to Look and Layout
3) Hit the "Change Theme" button next to your "Current Theme"
4) Pick a different theme (I'm using DeepBlue atm)
(Note: I've reset everyone to Deep Blue for now. We'll try to figure out how to get the old theme up and running again.)
We'll work on getting things back to normal in the near future.