I think spiff would not mind if I quote his email to me:

'Catwoman was canceled for IMAX at the very last second by WB. (They're having a tough time getting just the 35mm version ready in time for release.) So we some how scored Spiderman 2. The catch being, we needed to get it finished in time to be released on 7/23, just as Catwoman was supposed to. It's been crazy busy... '