Can I get away with testing sites using IE8 with IE7 compatibility on?

Question

As a developer, can I safely upgrade to IE8 and use its IE7 compatibility mode to test how sites look in IE7? For IE6, I have a virtual machine and it is quite inconvenient. I d

Answer 1

The MSHTML code changed. IE7 compat mode should be pretty damn close to IE7, but... the code changed. I would still test both.

Microsoft makes Virtual PC images available for testing this.