FYI - if you ever try to open Photoshop and it comes up with a message that you're running out of scratch space, and then an unrecoverable error, check how full your hard drive is (or whatever drive your scratch space is on) on your PC. I had this problem at work earlier this week. It turned out that some automated system save procedure that they have almost filled my hard drive. I got no messages about it being almost full. The only indication was when I tried to open Photoshop and I got the error. The problem was quickly sorted out by one of the help desk guys but I figured I'd pass it on in case someone here gets the issue.