--- Operating System, Graphics card ---

Linux Mint 15, Geforce GTX 580


--- Blender version with error, and version that worked ---

Blender 2.68 rev 58463, from IRIE shinsuke (deb package)


--- Short description of error ---

The rotation animation plays correctly in the viewport, but if you either render the animation or switch
the viewport to rendered or textured, propeller blade rotational position is messed up, even then when you switch
back to solid, CTRL Z resets this to correct state again, but i am unable to render out the rotating propeller (its an object group instance)


--- Steps for others to reproduce the error (preferably based on attached .blend file) ---

Open Blend and animate in viewport. The propeller should rotate correctly. Then if you try to render in any way (Blender internal tested only)
Propeller Blade position is messed up.