--- Operating System, Graphics card ---
Windows 7 64bit, intel internal HD4000

--- Blender version with error, and version that worked ---
latest tested with issue:
blender-2.67-r57951-win64.zip

--- Short description of error ---
the blender internal "rendered" 3D viewport sometimes does not update.
(i really like these "rendered" viewports)

--- Steps for others to reproduce the error (preferably based on attached .blend file) ---
- open the attached blend file
- on the left viewport change to "rendered".
- select an object in that viewport and make some (faster) grab movements with the object (e.g. [G]+[Shift][Z]).
sometimes when you click the mouse, to accept the grab/scale/.. changes, the rendered viewport stays in an older unupdated version of the scene.

specially when your viewport is zoomed in it happens on my system.
watch the attached video, to see, what i mean.

(it is not a big problem, if the viewport does not update during the change process - i think for that it is not made for, but it should be up tp date for sure, then the change is done in the scene.)