2005.03.17 10:47 "[Tiff] Photoshop Masked area TIFF images", by

2005.03.18 22:17 "Re: [Tiff] Re: Tiff file with Transparency mask (former 'Photoshop Masked area TIFF images')", by Pascal Peuch

I would add that, according to the standard, though PhotometricInterpretationTag specific value [4] is in the scope of the baseline, baseline readers are not supposed to read more than the first IFD (but they are supposed not to crash).

I'll send you such a file next week.