My 50D is on its way to the Canon Service Center. I was taking pictures this morning, and all of a sudden I got an Error 20. Said to turn off the camera and take out the battery and put it back in (not in those words but you get the gist). I could take one picture at a time, as long as I turned it off and on in between (as I got the message each time). It wasn't making a great sound, and I read that the error 20 is a mechanical error. I tried switching batteries, and then lenses, but the problem continued. So I didn't waste time, I sent it off to Canon. It's under warranty. Just sucks because Natalie's first day of school is Monday (my friend said I can use her camera for it). And I'm still doing Project 365 (so the P&S will come out of semi-retirement).
Anyhow, I hope it comes back quickly and that it's a simple fix. Just very sad about it. And I feel naked without it already.