You all have been a wealth of information and I really appreciate it,But this morning on a shoot I decided to use the D300 and when I took it out of the case it would not work. (Just my luck). I fiddled with it looking in all directions when I turned it right side up it said the battery was dead. What gives? I just put a new battery in it last night plus I have the MD-10. I replaced the battery with another fresh one and it read full charge but, still no lens recognition. I went to put it in the bag and when I set it down I looked at it before putting it away and it was reading 3.5. You've got to be kidding me, I've got Gremlins? This is too much I'm going nuts I've already been without my Digital for 3 weeks and having to shoot everything with my Hassy has been a pain cause I don't have a good selection of lenses. What up with this, Has anyone ever heard of anything like this? This camera has never been dropped,rained on,misused, or abandoned, I've always treated this camera with love and respect. HELP!!!