1997.02.24 18:02 "Bug in TIFF directory", by Greg Kochanski
As exposed on UnixWare, there is a bug in tif/tif_open.c.
On line 35 and vicinity, a long int is set to 0xffffffff. Strictly speaking, that should be an unsigned long int, as the int overflows. The Solaris compiler ignores this, but Unixware gives a warning.
I have TIFF 3.3beta, from the xv3.10a distribution.