after upgrading firmware, are you really seeing a significant difference in d2x af, etc. i am very curious, i did the upgrade and have a 17-55 on my camera, the first time i turned it on after upgrade to take a picture, the af did the weirdest thing. it was like it recalibrated, i am shooting in af-s, the af acted like af-c, but only once. it does seem to focus a little differently, your observations please. marc ps; i do not have focus problem, i am not looking for something magical, and i certainly am not some hysterical DPR crazy, who thinks this firmware upgrade has performed magic to my camera.