It's true; there is a separate cut of AOTC for IMAX. It had to be edited down due to the limitation of how much film fits on an IMAX reel. It was also not in full widescreen since IMAX has a different aspect ratio. I was lucky enough to catch this at an IMAX near Houston, and it was interesting. Duplicating it would be difficult... it would be nice if someone had camcordered it at some point for reference.