I’ve previously argued about the X-UA-Compatible issue. I withhold that using the old IE7 Standards mode per default is the best Microsoft could have done for web compatibility. However, it’s not the best they could do for compliancy to the web standards or for interoperability with other browsers. Microsoft recently announced the Microsoft Interoperability Principles [...]

The ACID3 test has officially been released! You can read about what it tests at The Web Standards Project: Acid3 Browser Test. Or you can take your browser through the test.

Internet Explorer 6
12 (thanks to Fumigator)
Internet Explorer 7
XP: 12 with addon, 5 without (thanks to Courtney Miles).Vista: 12 (thanks to inigoesdr)Win2k3 Server with Internet Explorer [...]