TestDriven.net, NUnit, & NCover - Great Combo. R U getting E

After reading many posts and articles about testing and test coverage in Visual Studio 2005 .Net, I decided to try it all. I really like the TestDriven.Net plugin and it runs NUnit and NCover really well. I use NCoverExplorer to show the results. It works Great!

The only concern is that I get an exception when I try to close NCoverExplorer. Does anyone else get this same behaviour?

Thanks.