Team Foundation Client Error in VS2008

A weird thing happened to me yesterday when I was trying to edit a couple of work items in Team Foundation client from Visual Studio 2008.

Could not load type 'Microsoft.TeamFoundation.WorkItemTracking.Client.WorkItemTypeDeniedOrNotExistException' from assembly 'Microsoft.TeamFoundation.WorkItemTracking.Client, Version=9.0.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a'.

The cause

I’ve installed the Team Explorer AFTER patching the VS2008 to SP1. Reinstalling the VS2008 SP1 again solved the issue by patching the Team Foundation client binaries, too.