gsh replied...
It's probably a dangling link to a man page... Try this , see if it shows up ls -lR /usr/local/man |grep -- "->" ls -lR /usr/man |grep -- "->" makewhatis reads the topof each man page to build a sumamry, it can get slightly confused when a man page is really a symlink to another page, but the target page doesn't exist ... [expn.8 is the man page for a mail utility]
Cheers gsh,I did move the man folder to the home partition because the root was getting low on space, so there is a symbolic link going to the man folder.
Won't loose any sleep over it Regards from Auckland Chae