dist-upgrade changed my default wm

["Vegard Lundby Rekaa" <vegardlr@student.matnat.uio.no>]

After I runned 'apt-get -u dist-upgrade' default wm changed from gnome to
xfce. I googled for the problem, but no previos thread helped me...
Got this output from my system:

hjem: # update-alternatives --config x-window-manager

There are 4 alternatives which provide `x-window-manager'.

  Selection    Alternative
-----------------------------------------------
      1        /usr/bin/metacity
      2        /usr/bin/xfwm4
      3        /usr/bin/fluxbox
*+    4        /usr/bin/gnome-wm

Press enter to keep the default[*], or type selection number:
hjem: #

What to do??

Cheers, Vegard