Having Internet Explorer 8 installed, the Web Browser control returns a value related to IE 7. This may cause some issue to customer's application which will run a test on the browser installed on end-users' machines.

This problem is caused by some changes that MS introduced during the IE 8 Beta1. The following link explains the problem and the solution.

http://blogs.msdn.com/b/ie/archive/2009/03/10/more-ie8-extensibility-improvements.aspx

In short, you need to add a registry key naming the executable (wrun32.exe or acuthin.exe, or if you have renamed the runtime, whatever name you gave it).