I dropped my 24-70 the day we were leaving on vacation in May. Sent it in, there was some impact damage , got it repaired ny Nikon and everything was working fine - or so I thought. Yesterday I did a shoot and remember it worked well. I usually do not correct the autofocus manually a lot, so I am not entirely sure it was 100% OK yesterday. I took the lens off the camera, reversed the lens hood, put the lens in the bag (Kata Bumblebee), did a few more photos with the 105 Micro went home. This AM I took the lens out, put the lens hood on, attached it to the camera and wanted to take some pics of stuff to see on fleebay... autofocus was difficult (low contrast) and I tried to correct it manually - and drat- the focus ring is just spinning!!! No effect on focus at all. Autofocus still seems to work fine. M M/A switch had no effect on it. Switched camera on and off, detached and reattached lens, no difference. WT* happened? I may have put the bag down a little harder than I should have (30 lbs of gear - by no means did I drop it) and the lens was sitting in the lower corner..... or maybe the "repair" was not as complete as I thought? Before you say "Send it back to Nikon", which I eventually will, I have some occasions coming up within 2 weeks that I need this lens for. Has this happened to anyone? As AF works, would you risk using hoping that this is not the first sign of the lens totally failing?