If you take a photo, extrude it and then group it (with a reflection, say, although the problem shows if you just apply a group to the single 3D photo), then move it, the picture moves about within the 3D block. It seems that it moves in the reverse direction to the way you move the block.

http://www.timhines.com/Temp/odd.jpg

Odd effect.

What I was trying to do was to try to replicate the effect on page 11 of the release notes, and was hoping that grouped 3D objects would work as one object for 3D rotations, but I guess that feature will be one for the wishlist