Whenever I play a long animation in GE and move the mouse simultaneously, the frame rate of the animation decreases. This is what I'm talking about:
I made an AVI movie, then extracted all the frames as individual image files. Next, I made these files an animation to play in GE. And it works quite decently, but whenever the mouse is moved the fps of the animation slows down, making a quite dumb looking animation... And, oddly enough, when the mouse in GE is disabled, when the mouse is moved this doesn't occur.
I doubt this is a fixable problem, but I thought I'd mention it to see what anyone else thinks about it....