So I just reinstalled WHS 2011 on my server, which stored all my WMC recordings via the TV archive plugin. Now these recordings won't playback in WMC. It says "Application Failure: A critical Windows Media Center process has failed. Restart the computer and try again. If the problem persists, contact your hardware manufacturer for assistance". I've obviously tried restarting both machines at this point. Also, the few recordings that hadn't yet transfered from the WMC machine to the WHS 2011 machine play fine.
These are NOT copy once recordings. In fact, if I just navigate to the recordings in windows explorer, right click them, and select "Play with Windows Media Center", they play back perfectly fine. Any ideas?