Just a suggestion to anyone that's having a flakey computer issue..
Get an account set up at somewhere like Box.net, Dropbox, G.ho.st, 4shared, or similar.. and back up your meshes there. Then, if things go down, you'll be able to pick up where you left off.
I currently have my ongoing stuff backed up on 3 hard drives, including one away from home, so that I'll never lose it all..
And using 4shared or similar won't cost you a penny. Hate seeing work going down the toilet because of data corruption or similar.. :p