Some of the best games I've ever worked on were lost to computer problems.
An awesome Spy vs. Spy remake I made was actually finished, and then, in a problem similar to Circy's, was destroyed on the same day I went to back it up. I also made a cool space game that I spent hours upon hours on after being inspired by the Klik game Star Angel that was lost on the day I went to back it up.
It's almost like my computer knows when I'm going to backup my files, and then it shits all over them.
Something like that happened recently. My father tried to move the harddrives between two computers and ended up deleting all the data on them, including some games I spent hours on making. I am getting used to this kind of things.
It happens to me rarely because I always save before I test my games, but this of course doesn't prevent all crashes. And in fact, the two worst losses weren't the fault of TGF or MMF at all.
Well the largest one was when I just got a new computer (well my family did) and I had about 20 or so hours of work invested into games and other projects already. We had a guest visiting who tried to install WinXP on the computer (at that time it had just come out), and my dad told him he didn't want WinXP, so then the installation was cancelled which consequently wiped the entire HD. Luckily I had my 2 finished games backed up on disk.
The other occurence was more strange.. it was kind of like Omega's situation. I was in the middle of saving a game that I had invested about 3 or 4 hours into and the power went out when I was in the middle of saving.
My flashdrive is rubbish (like USB in general in my experience...), if you cough on it or do anything bar leave it on a desk, it corrupts (lucky it has its own hardware level formatting program dealy). My flash mp3 player is much better but very very slow .