>468 SEE ALSO
/usr/ports/UPDATING

20060616:
AFFECTS users of emulation/linux_base-*
AUTHOR: netchild@FreeBSD.org

We now use Fedora Core 4 as the linux base port, and the corresponding
xorg libs for the linux X11 libs port.

To upgrade you have to run
portupgrade -f -o emulators/linux_base-fc4 linux_base\*
portupgrade -f -o x11/linux-xorg-libs linux-XFree86-libs