Hmmmm...the code in the game is kinda too long(over 4000 lines, and the problem involves most of it) to put in here, but I've tried making an example program for the purpose of showing you...but the problem doesn't come up. That just doesn't make sense. I've still had that problem before, though. If the object was off-screen, it wouldn't update. Sorry if that doesn't help any.
Say you take a long pole-like object, and rotate a cube. Position and orientate the pole with the cube. When the cube goes offscreen, the pole should stop moving(according to my problem thing). Only that doesn't happen. Man, this is confusing.
Hmmm...I guess I can't verify it. Anyway, it's not happening anymore. I probably just screwed up my code...it happens a lot! Anyway, I AM the god of false alarms. Sorry to have wasted your time!