Quote Originally Posted by neuroanatomist View Post
I'd be interested to hear what Canon tells you.
I would be interested to. After reading the CR thread it sounds like a batch of current lenses with the issue. It would be a surprise if it were the result of a fix of some other problem and it is now normal.

I think more likely from the reports on CR it sounds like they got a bad component that went in the lens by accident for a period of time.