Centurions standing at outer guardian of cabals. This is about
as blatant of a bug as I've seen.

Log snippet below.

------------
Standing Before the Fortress of Light 
  The Fortress of Light rises before you, standing strong and
proud in a
mantle of snow and ice.  The thick walls of this fortress are
built of huge,
perfectly cut, white stones fitted tightly together.  The
stones along the
base of the fortress are enormous, taller than any giant and
more massive
than most houses.  Pennants flying above the watchtowers
rustle and flap
defiantly in the chill winds.  The huge gate of polished
silver is guarded
by a lone figure.
 
[Exits: north south]
(Red Aura) A Centurion stands here collecting the tithe for
the Empire.
(Red Aura) A Centurion stands here collecting the tithe for
the Empire.
A huge figure in deep gray armor guards the gate.

Centurions have decided, as a group, that the Fortress is so
lame that they refuse to ever be in it.