2010.04.26 21:59 "Re: [Tiff] [CRITICAL] libtiff 3.9.3 incorrectly writes out TIFFTAG_REFERENCEBLACKWHITE tags", by Bob Friesenhahn
I'm currently trying to upgrade from libtiff 3.7.0 to libtiff 3.9.3 and found a serious problem in its handling of TIFFTAG_REFERENCEBLACKWHITE.
Where did you find a libtiff 3.9.3? Who produced it?
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/