Currently missing, mew modular xorg puts man pages in these sections at least by default (unless it's intended to force these into man[1345] in which case please close this as not a bug ...)
Xorg contains manpages with names that conflict with system manpages. In the past that wasn't much of a problem since X installed the manpages into the /usr/X11R6 hierarchy, however X11R7 installs them to /usr/share/man. In order to avoid the namespace conflict between Xorg manpages, and system manpages, X.Org has changed the X manpage directories to "man?x", so they do not conflict.
This problem is fixed in the last version (man-1.5p-7). Thank you for your notice.