All AUR contributors, please note that "Man pages *should* be installed to /usr/share/man from here on out. The new makepkg (3.1) will no longer move man pages to /usr/man. This will begin our slow-but-steady phase in of FHS compliant man pages." Packages which EXPLICITLY use /usr/man in the PKGBUILD (perhaps through a configure option) should be fixed.
TUs please take a look at http://bugs.archlinux.org/task/9189