2005.09.30 12:58 "[Tiff] Re: VC Win32 compile", by Greg D
I am answering my own question here, so that if someone else has the same problem, they'll see the solution.
It appears there is a second configuration information beeing kept in libtiff/tiffconf.h. Comment out line #42
// #define JPEG_SUPPORT 1
NOTE: If you juset set it to 0 the compilation will still fail as the checks are looking for the existance of the variable, not its value.