Browsers that work perfectly (in my testing):
Firefox 3 up to the newest at the time of this post
Opera 9 and 10 - Although this browser gets into the best category, it does not support rounded corners. (Although that's about the only thing it doesn't support.)
Internet Explorer 8 RC1
Browsers that work (in my testing), but have visual errors:
Firefox 2
Chrome 1.0.154.43
Safari 3.2.1
Browsers that do not work (in my testing):
Internet Explorer any version before 8 RC1
Opera any version before 9
