All right, got it backed up and deleting the "blk..." files seemed to get it going. It should only take a week or two to download the whole quarter of a million blocks again. Hopefully, it will work.
I did attempt to back up the wallet under File>Backup Wallet. All I got was a text file full of gibberish.
I don't know where the blockchain is located in Ubuntu. Not a clue.
I didn't know that 11.10 ever was supported. It sucks and I hate it, but it's the best I can get in my price range.
I also cannot find the peers.dat or .lock files.
I'm just an operator, and I don't know anything about what's under the hood. Most of these suggestions, while very much appreciated, are way over my head. :0/
I'm trying to buy Bitcoins at Bitinstant, but they want me to use some system called ZipZap. I've never even heard of it and neither has anyone else. I bought through Bitinstant once before and I used Western Union and everything was fine.
I've tried contacting the people at Bitinstant, but they ignore me.