I have a Bogen/Manfrotto 3021BPRO tripod with a 322RC2 grip type ball head by the same manufacturer. This combo was great with my D70 and D200. But, then I got the D2x, and I started having problems with the ball head. It just could not support the weight of my new camera with any large lens/flash combo. I had to tighten the grip action on the head so tight, it then became difficult to move anything. And, doing this did not guarantee that the whole setup would not move when the camera was in the vertical position. So, I just bought a new head.
The head that I ordered is this:
http://www.bhphotovideo.com/bnh/controller/home?O=workaround.jsp&A=details&Q=&sku=368325&is=REG
As you can see, it is the "Bogen / Manfrotto468MGRC2 Magnesium Hydrostatic Ballhead with Rapid Connect 2 System (RC2 Quick Release) - Supports 22 lb (10 kg)".
Hopefully, this will take care of the problem.
Has anyone run into this problem as well?
