XFCE Login Freeze

[Jonathan Allen]

Hi list,

We have a multi-workstation network, with several nodes running F16/XFCE
on remote-mounted home directories.  All users can log in and out without
any difficulty except one.  This user gives name and password but then
freezes indefinitely.  'ps' shows a variety of tasks running, but nothing
appears on screen except the standard wallpaper; time is present but
nothing else.  Running are startxfce, xfce-session, etc.  User can be
cleared by "kill -15 <startxfce-pid> and other users can log then log in.

What might be causing the freeze - is there some lockfile that needs
removing to unlock the user's account?

Jonathan