Resharper 6.1 EAP throws an exception upon load

Last night I updated my ReSharper 6.1 EAP extension within VS 11 Developer Preview, I was several builds behind and thought it best to try and stay in sync.

Updating is easy enough, however upon restarting Visual Studio I was finding Resharper was throwing exceptions on load and wanted to send information about them "home".

I decided to look at the "detailed information" that shows the stack trace and found the following:

Could not load file or assembly 'JetBrains.ReSharper.UnitTestFramework, Version=6.1.13.115

It turns out that this was happening in the xunit contrib plugin I had loading for Resharper so I could run my XUnit tests within its runner.

For now I rolled back by Resharper version until I get chance to either get the source for XUnit Contrib and fix the issue or someone else does it for me :)