I heard about the problems early last year, but it's been a long while since I've seen it brought up lately.
The deal was, anything short of a death-grip and the gun wouldn't fire.
This is something you can check at the gun store just by dry-firing a couple times with the grip held in various ways.
I don't think it was anything more than a specific problem with a few specific guns, and one that could be remedied easily once you knew about it.
That said, I'm glad mine is a Series I.
4" bbl shoots some serious groups. (Just wish I could!)