1998.02.23 13:11 "TIFF validation tests?", by Dan Smith

1998.02.28 00:34 "Re: TIFF validation tests?", by Sam Leffler

Try using tiffcp to conver from G4 to some other compression algorithm and then view the resulting image. If there's a problem you'll still be unsure if it's the input data or tiffcp but chances are that it's the input data.