Basically to provide 100% pixel perfect on IE(6,7,8,9) suupport:
IE versions can't be installed side-by-side (and the un/install process on Windows is very inefficient). So you have to have to have at least 4 VMs/boot partitions (at least 1 of which must be running XP), each loaded with a different version of IE. Each with a different version of debug tools.
And unless you force (strict mode) on IE8(& 9?), test IE8 in IE7 mode, IE8 Compatibility mode, and IE8 Strict mode....
Fortunately my employer dropped IE6 support 2 years ago. Plus, I find that usually just testing for IE7 in IE8's IE7 mode, and forcing IE8 to render pages in IE8 strict mode, is generally sufficient 95% of the time.
IE versions can't be installed side-by-side (and the un/install process on Windows is very inefficient). So you have to have to have at least 4 VMs/boot partitions (at least 1 of which must be running XP), each loaded with a different version of IE. Each with a different version of debug tools.
And unless you force (strict mode) on IE8(& 9?), test IE8 in IE7 mode, IE8 Compatibility mode, and IE8 Strict mode....
Fortunately my employer dropped IE6 support 2 years ago. Plus, I find that usually just testing for IE7 in IE8's IE7 mode, and forcing IE8 to render pages in IE8 strict mode, is generally sufficient 95% of the time.