Thanks for your patience while programmers are working on fixing some of the bugs related to CR4's new look.
Most notably, CR4 isn't displaying so well in Internet Explorer 8. Here are the known formatting problems:
White text on white background on login screen
White text on gray background in recent comments and good answer boxes
White text on white background for the quote at the bottom of the page
Field labels like "by" and "pathfinder tags" are white text on white background on the all recent threads page
Update: The IE formatting issues have been resolved!
If you're experiencing any visual problems with parts of the site not listed, please describe them below. Including a screen shot helps, too.