Group: current SVN version
If a camera is parented to a rotating empty, the rotation from the camera view
is only correct at the frame number it got parented.
In the attached blend file you'll see that rotating the camera in the left 3d view
(select camera, r, MMB, move mouse) will turn the view in the desired direction.
If you go to frame 100 (shift+rightarrow) and try the same trick, the camera view
will rotate along incorrect angles.
Sorry Martin for bringing this up again.