X startup errors after "pkg upgrade" in FreeBSD

After a recent pkg upgrade, which updated the X server, I had the following error when starting X:

  freebsd 10 module ABI major version (6) doesn't match the server's version (12)

Closely followed by:

  freebsd RADEON(0): [drm] Failed to load kernel module for pci:0000:01\ :00.0: No such file or directory

It appears that one needs to manually rebuild the driver in use:

  cd /usr/ports/x11-drivers/xf86-video-ati
  make && make deinstall && make reinstall

A failing in the pkg update system? I wish I knew...