I have a ticket open on this already so the awesome support people up here don't need to spend your time troubleshooting, but I'd like to see if anyone else has come across this before. I've had 2 of my machines so far give "Unknown User" (out of 70 or so) when the user goes to login after encryption. When we do a recovery, the console shows the machine name of another machine entirely. If we boot into Windows and then make some changes to the computer and sync, the right accounts come down and recovery shows the right machine.
Our installation process is completely manual & post image, so there's no chance of any GUIDs being mirrored or included on the image, and I've confirmed in both situations that the GUIDs are different.