I was shooting rehearsal today with my 50 and went to change lenses and it wouldn't budge.
I am able to push the release button down but then lens will not move. It just wiggles a tad, but the same amount as if I didn't push the button down. When I push the button down it sounds like something is happening but the lens won't come off. Any ideas? A google search lead to a bunch of unanswered topics. Thanks!
Edit: Forgot to add. I can still take pictures and they turn out just fine. No AF problems either.