Upgraded from 3.1 to 3.3.1 and getting White Screen

Hi everybody. I just upgraded to WordPress 3.3.1 (I had 3.1 before)

Whenever I try to save anything like a setting or post, I get a white screen. The settings/post/etc do save, so that’s good, but getting the white screen is pretty annoying.

I’ve tried to disable all my plugins, but that didn’t help. Can anybody please tell me how to fix this?

Many thanks!
-Mike