brimforge said:
Nope, Ady is correct on position of Vaders hands for continutiy - in ANH he often held unto his belt too ...
http://www.jedi1.net/jedi1.net/images/1600/ANH-Darth_Vader-04592-1600.jpg
the main problem, and here is judging the screencap, is the angle and the way his hands are holding the belt in this shot - so maybe it is just a "delusion of the eye", but it would have been better if the actor had grabbed his belt more like this:
http://www.dailydesigninspiration.com/diverse/3d/jasonmartin/Darth-Vader.jpg
If you want to get an idea of how Vader holds onto his belt, then the best way of researching this is not to go to any CG figure or someone else in the suit, but Darth Vader only when Dave Prowse is in the costume.:
As you can see, the way the hands are placed in the hologram are correct.