While I like many of the features of my D7000 compared to my D300 I have found one rather annoying feature. The mode button has a tendency to shift from A to M seemingly by itself. While I am sure that it is actually me accidentally turning the knob it seems to switch from A to M at the worst times with a resulting under or overexposed image. I'm at the point where, before I start shooting, I am going to set a proper exposure in M mode just in case the dial accidentally gets turned while I am shooting in A mode.
The dial doesn't seem to be overly fluid (and subject to an easy flip from one mode to another) in that I can feel a small resistance when I switch modes. At least on my D300 I have to deliberately depress the mode button and then turn the command dial. I have never had it go from one mode to another accidentally. Is this a common issue or am I just being clumsy?
Graham From St. Augustine, FL. "I like photographers, you don't ask questions." Ronald Reagan to White House Press Photogs
That's a common complaint about the D7000. Nikon recognized it and put a lock button on the D7100, similar to the higher level Nikon bodies.
The complete solution is a trade in for a D7100, but the cheap solution is a small rubber band or O-Ring that will keep the dial from turning at the slightest provocation. You can also just be very aware that it can happen and check it constantly.
I shoot in manual, so when it happens to me, I'm suddenly in U2, which was my bird settings. Since I get my D600 (which also has the button release like the 7100), my 7000 is now a full time back yard camera and rarely gets bumped out of M.
Jim Singler D600/D7K with a bunch of lenses and other assorted stuff
I've had one instance when my mode dial, which was set for "A" mode shifted to "M". It only occurred, however, when I moved the release mode dial. Apparently, my fingers also moved the mode dial inadvertently at the same time.
I've subsequently been quite careful to move only the release mode dial when I'm changing that dial's setting.
I would prefer a lock button on the mode dial, like the one on the new Nikon D7100. Apparently, Nikon's engineers wanted to ensure that the mode dial couldn't be shifted inadvertently on the newer camera.