The smb.conf man page does not build properly from a 3.0 GIT snapshot from 26 April 2008. The following two lines appear in the "middle" of the doc EXPLANATION OF EACH PARAMETER <xi:include></xi:include>.SH "WARNINGS" This error results in the "EXPLANATION OF EACH PARAMETER" section being pretty much empty.
*** Bug 5445 has been marked as a duplicate of this bug. ***
Seems to be fixed meanwhile. Please re-open if it is still an issue for you. Thanks for reporting!