+1  A: 

I have been working on VS2005/2008 with IE8 for several months without problem now after changed the IE security zone and tabprocgrowth setting.

Sheng Jiang 蒋晟
Here's a link for tabprocgrowth: http://weblogs.asp.net/abdullaabdelhaq/archive/2009/06/01/VS-Debug-Problem-with-IE8.aspx
Eric J.