After I upgraded libtiff to libtiff-3.5.4-2 from the RawHide, pnmtotiff started reporting, "pnmtotiff: error in loading shared libraries: /usr/lib/libtiff.so.3: undefined symbol: jpeg_resync_to_restart". I guess this means that either some symbols that used to be in libtiff were removed, or there were implicit lib dependencies built into libtiff that were removed. I fixed this by adding "-ljpeg -lz" to the end of the LOADLIBES line in Makefile.tiff in libgr-config.patch and rebuilding.
Good catch. This was fixed in libtiff-3.5.4-3, I think. Definitly fixed in -4, regardless.