Until short time ago I was only using manual AI-S lenses on my camera, so I have set the AF mode selector on the camera to M.
But lately I got a few AF-D and AF-S lenses as well and now I sometimes forget to set it back to M. I did not find anything in the manual that specifically says that for using manual lenses I have to set it back to M and I can't see any problems so far. But I would like to know if anyone here has run into a problem (e.g. damaging the camera) by using manual lenses with the AF selector set to anything else but M.
As a side note: I do know that the manual lenses will not automatically focus if the selector is set to S or C... :)