What Browsers Should I Support?

Biggest issue with IE6 for me is the Transparent PNG's. Seriously how can a browser be so fucking handicap'd. Anyway I had no choice as IE6 was still 9% of traffic on our site.

Definitely check on iPhone, iPad, Android, IE6+ (IE7+ min), FF, Chrome, Safari, Opera

That will pretty much cover your ass. Make sure you test everything though. You will find that things behave very differently in each browser.
 


Firefox 4.0 is better than Google Chrome (which I was using before era of FF4). Don't forget about Opera which is also a good browser.