Quote Originally Posted by another view
Not to start an arguement or hijack the thread, I don't really think this is a good solution. Reason I say this is that what do you do when you put the lenses on another body? Are they now "off" with that other body? I'm curious, I've heard of the problem before but never heard what the fix was (or never really thought about it if I did).
I agree with Peter and think he should send them all in if he's really concerned.

And you might very well be right that those lenses would then perform differently on another camera. It's a completely valid concern that you brought up. For me, I need the lenses to work on my main camera so I'd send them in with my main camera. I'd worry about focus problems one another camera if I ever get to that point of having another camera.

PS. I hate canon's autofocus system

PSS. Please place emphasis on my previous statement