2009.02.16 15:10 "Re: [Tiff] Different output with the same image???", by Bob Friesenhahn
Did you write this image using libtiff? It would be best if libtiff would always write bytes like this with a zero value, so I would consider this a (minor) bug. (Never write data from uninitialized buffers, to prevent data leakage and security/privacy issues and all that stuff.)
This behavior also tends to annoy memory check tools like valgrind, making it more difficult to dignose issues in libtiff, and its dependent application.
GraphicsMagick Maintainer, http://www.GraphicsMagick.org/