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From a Yahoo Groups posting of mine:
I have since upgraded to 10.3.3 and it's the same issue [some PC generated JPEGs render as black box on OS X viewer, Safari, etc]. It looks like Quicktime/Mac has problems with some of the ICC headers [color profile] that some windows photoshop plug-ins insert into a JPEG 2000 file. GraphicConverter doesn't have the problem and when it saves the files the headers are accepted on the Mac.
BTW, I think the JPEG2000 world is really starting to pop. After years of quiet I see a lot of Photoshop Plug-In out there -- from free to $50. QuickTime supports it (sort of, see above) as does GC (very well). Due to QT support Safari and iPhoto show JPEG2000 images.
Acrobat Distiller 6.0 supports JPEG2000 compression, as do the Acrobat 6.0 readers.
For document scanning there's no real alternative that's not totally proprietary. (JPEG2000 is "standard" but patent encumbered.)
I'm going to try some other PhotoShop Plug-Ins until I find one that renders JPEG2000 images that QuickTime can open. GC will be one way to test problematic items.