I installed 2.3.3 for the first time, and there are 2 problems so far:
1. Default Theme doesn't display correctly (the background is all grey instead of some white, and the header image has no rounded corners)
2. On post-new.php, the Visual wysiwyg images don't display -- they're all flat, about 1px high and some color is visible.
I'm using Mozilla suite 1.7.13
Any ideas? Maybe some of the files were corrupted?