Basically anything that complies with W3C standards, and runs on Mac OS X.
Browsers supported and tested on Mac OS X: Firefox, Safari, Opera, Google Chrome.
No browsers tested for Windows platform.
MSIE will never be tested and never supported - I'm a Mac user.
If it works, then you're in luck :(
If it doesn't work, then complain to Microsoft for failing to comply with W3C web standards. I'm not wasting my effort figuring out fixes and workarounds.