$ cat ~/.xsession-errors
/etc/gdm/Xsession: Beginning session setup...
Setting IM through im-switch for locale=de_DE.
Start IM through /etc/X11/xinit/xinput.d/all_ALL linked to /etc/X11/xinit/xinput.d/default.
gnome-session[1025]: WARNING: No required applications specified
GNOME_KEYRING_CONTROL=/tmp/keyring-H3uNsk
SSH_AUTH_SOCK=/tmp/keyring-H3uNsk/ssh
GNOME_KEYRING_PID=1072
GNOME_KEYRING_CONTROL=/tmp/keyring-H3uNsk
SSH_AUTH_SOCK=/tmp/keyring-H3uNsk/ssh
GNOME_KEYRING_CONTROL=/tmp/keyring-H3uNsk
SSH_AUTH_SOCK=/tmp/keyring-H3uNsk/ssh

(polkit-gnome-authentication-agent-1:1095): GLib-GObject-WARNING **: cannot register existing type `_PolkitError'

(polkit-gnome-authentication-agent-1:1095): GLib-CRITICAL **: g_once_init_leave: assertion `initialization_value != 0' failed

(gnome-power-manager:1086): GLib-GObject-WARNING **: /build/buildd/glib2.0-2.24.1/gobject/gsignal.c:2273: signal `proxy-status' is invalid for instance `0x9edada8'

** (gnome-power-manager:1086): WARNING **: Either HAL or DBUS are not working!

** (gnome-power-manager:1086): WARNING **: proxy failed

** (gnome-power-manager:1086): WARNING **: failed to get Computer root object

** (gnome-power-manager:1086): WARNING **: proxy NULL!!
** (nm-applet:1093): DEBUG: old state indicates that this was not a disconnect 0
/usr/lib/pymodules/python2.6/gtk-2.0/gtk/__init__.py:127: RuntimeWarning: PyOS_InputHook is not available for interactive use of PyGTK
  set_interactive(1)
** (nm-applet:1093): DEBUG: foo_client_state_changed_cb

** (gnome-settings-daemon:1073): CRITICAL **: setup_bg: assertion `manager->priv->bg == NULL' failed
evolution-alarm-notify-Message: Setting timeout for 13819 1275688800 1275674981
evolution-alarm-notify-Message:  Sat Jun  5 00:00:00 2010

evolution-alarm-notify-Message:  Fri Jun  4 20:09:41 2010

** (update-notifier:1377): DEBUG: Skipping reboot required