WARNING: ZIPLINKS may fail!

[Rick Updegrove]

The following error has been annoying me for some time (well over a month):

ps wwwaux
<snip>
root         101  0.0  0.1   864  172 con- I    10:47AM   0:00.01 
readproctitle service errors: 
.......................................................................................................................................................................................................................................................................................WARNING: 
zlib include files differ from library.\nWARNING: ZIPLINKS may 
fail!\nWARNING: library 1.1.4, include files 1.1.3\n


So, I have attempted to track down the culprit but I cannot seem to 
figure out what got compiled with the incorect header files??

This is a 4.8 STABLE that has been built recently (before the problems 
noted on this list in the past week or 2) and I have portupgrade -ra 
many times.  So, any clues as to how to track this down would be greatly 
appreciated.

Rick