>I believe there are many more D7000's which have >been sold to customers which are not focusing correctly and >many photographers might not even be aware of the problem.
Let's concentrate on solving your own camera's problem, whatever the cause may be. If a large number of D7000's were experiencing this same problem we would certainly have heard about it in this Forum long before now!
As Stan suggested, we'll be able to help more if you could post some examples with EXIF intact, and provide some more details of your camera settings. Thanks!