Can't change window managers "on the fly"

["David J. Kanter" <djkanter@nwu.edu>]

I used to be able to change window managers "on the fly" by selecting a
manager from the Window Managers menu. But after updating a few managers to
the Potato version, selecting a new manager from the Window Manager menu
kicks me out to the xbanner login. Any ideas?

-- 
David J. Kanter
djkanter@nwu.edu

"Humans have an innate tendency to attribute significance to anomalies
and coincidences."
  -- John Allen Paulos, mathematics professor at Temple University