Created attachment 186953 [details]
Screenshot of the crash.  Notice the incorrect position of UI elements in the top and bottom panels.

Logging into GNOME 3.0 over NX takes about 30 seconds before gnome-settings-daemon finally crashes.  All the UI elements on the taskbar are crammed over to the lefthand side, making the shell unusable.  Subsequent logins -- even local logins -- have all the UI elements in the wrong position too, and there is no way to move them in GNOME 3.0, so you're stuck using panels with broken layout.

Once gnome-settings-daemon crashes, trying to report the bug through the bug reporting UI gives the error:

    'hansim' does not exist

..so I was not able to get a stack trace.

This is a fresh install of Fedora 15 Beta.

--

.xsession-errors:


gnome-session[17537]: WARNING: GSIdleMonitor: IDLETIME counter not found
gnome-session-is-accelerated: No composite extension.
gnome-session-check-accelerated: Helper exited with code 256
gnome-session[17537]: WARNING: Session 'gnome' runnable check failed: Exited with code 1
gnome-session[17537]: WARNING: Unable to determine session: Unable to lookup session information for process '17537'
gnome-session[17537]: WARNING: Could not parse desktop file /home/luke/.config/autostart/xfce4-settings-helper-autostart.desktop: Key file does not have key 'Name'
gnome-session[17537]: WARNING: could not read /home/luke/.config/autostart/xfce4-settings-helper-autostart.desktop
gnome-session[17537]: WARNING: Could not parse desktop file /home/luke/.config/autostart/xfconf-migration-4.6.desktop: Key file does not have key 'Name'
gnome-session[17537]: WARNING: could not read /home/luke/.config/autostart/xfconf-migration-4.6.desktop
GNOME_KEYRING_CONTROL=/tmp/keyring-j6pkqB
GPG_AGENT_INFO=/tmp/keyring-j6pkqB/gpg:0:1
GNOME_KEYRING_PID=17693
GNOME_KEYRING_CONTROL=/tmp/keyring-j6pkqB
GPG_AGENT_INFO=/tmp/keyring-j6pkqB/gpg:0:1
**
GnomeDesktop:ERROR:gnome-rr.c:256:screen_info_free: assertion failed: (info != NULL)
gnome-session[17537]: WARNING: Application 'gnome-settings-daemon.desktop' killed by signal
**
GnomeDesktop:ERROR:gnome-rr.c:256:screen_info_free: assertion failed: (info != NULL)

(polkit-gnome-authentication-agent-1:17743): polkit-gnome-1-WARNING **: Unable to determine the session we are in: GDBus.Error:org.freedesktop.ConsoleKit.Manager.GeneralError: Unable to lookup session information for process '17743'
Failed to play sound: File or data not found

MCS->Xfconf settings migration complete


** (nm-applet:17738): WARNING **: _nm_object_get_property: Error getting 'WirelessHardwareEnabled' for /org/freedesktop/NetworkManager: (9) Rejected send message, 3 matched rules; type="method_call", sender=":1.97" (uid=500 pid=17738 comm="nm-applet ") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination="org.freedesktop.NetworkManager" (uid=0 pid=1189 comm="/usr/sbin/NetworkManager --no-daemon "))


** (nm-applet:17738): WARNING **: _nm_object_get_property: Error getting 'WwanHardwareEnabled' for /org/freedesktop/NetworkManager: (9) Rejected send message, 3 matched rules; type="method_call", sender=":1.97" (uid=500 pid=17738 comm="nm-applet ") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination="org.freedesktop.NetworkManager" (uid=0 pid=1189 comm="/usr/sbin/NetworkManager --no-daemon "))


** (nm-applet:17738): WARNING **: _nm_object_get_property: Error getting 'WimaxHardwareEnabled' for /org/freedesktop/NetworkManager: (9) Rejected send message, 3 matched rules; type="method_call", sender=":1.97" (uid=500 pid=17738 comm="nm-applet ") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination="org.freedesktop.NetworkManager" (uid=0 pid=1189 comm="/usr/sbin/NetworkManager --no-daemon "))


** (nm-applet:17738): WARNING **: _nm_object_get_property: Error getting 'State' for /org/freedesktop/NetworkManager: (9) Rejected send message, 3 matched rules; type="method_call", sender=":1.97" (uid=500 pid=17738 comm="nm-applet ") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination="org.freedesktop.NetworkManager" (uid=0 pid=1189 comm="/usr/sbin/NetworkManager --no-daemon "))

** Message: applet now removed from the notification area

** (nm-applet:17738): WARNING **: get_all_cb: couldn't retrieve system settings properties: (9) Rejected send message, 3 matched rules; type="method_call", sender=":1.97" (uid=500 pid=17738 comm="nm-applet ") interface="org.freedesktop.DBus.Properties" member="GetAll" error name="(unset)" requested_reply=0 destination="org.freedesktop.NetworkManager" (uid=0 pid=1189 comm="/usr/sbin/NetworkManager --no-daemon ")).

** (nm-applet:17738): WARNING **: nm_client_get_devices: error getting devices: Rejected send message, 3 matched rules; type="method_call", sender=":1.97" (uid=500 pid=17738 comm="nm-applet ") interface="org.freedesktop.NetworkManager" member="GetDevices" error name="(unset)" requested_reply=0 destination="org.freedesktop.NetworkManager" (uid=0 pid=1189 comm="/usr/sbin/NetworkManager --no-daemon "))


** (nm-applet:17738): WARNING **: _nm_object_get_property: Error getting 'ActiveConnections' for /org/freedesktop/NetworkManager: (9) Rejected send message, 3 matched rules; type="method_call", sender=":1.97" (uid=500 pid=17738 comm="nm-applet ") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination="org.freedesktop.NetworkManager" (uid=0 pid=1189 comm="/usr/sbin/NetworkManager --no-daemon "))


** (nm-applet:17738): WARNING **: Failed to register as an agent: (32) No session found for uid 500

** (nm-applet:17738): WARNING **: _nm_object_get_property: Error getting 'State' for /org/freedesktop/NetworkManager: (9) Rejected send message, 3 matched rules; type="method_call", sender=":1.97" (uid=500 pid=17738 comm="nm-applet ") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination="org.freedesktop.NetworkManager" (uid=0 pid=1189 comm="/usr/sbin/NetworkManager --no-daemon "))


(gnome-power-manager:17741): Gdk-WARNING **: The program 'gnome-power-manager' received an X Window System error.
This probably reflects a bug in the program.
The error was 'BadRequest (invalid request code or no such operation)'.
  (Details: serial 116 error_code 1 request_code 150 minor_code 8)
  (Note to programmers: normally, X errors are reported asynchronously;
   that is, you will receive the error a while after causing it.
   To debug your program, run it with the --sync command line
   option to change this behavior. You can then get a meaningful
   backtrace from your debugger if you break on the gdk_x_error() function.)


** (nm-applet:17738): WARNING **: _nm_object_get_property: Error getting 'ActiveConnections' for /org/freedesktop/NetworkManager: (9) Rejected send message, 3 matched rules; type="method_call", sender=":1.97" (uid=500 pid=17738 comm="nm-applet ") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination="org.freedesktop.NetworkManager" (uid=0 pid=1189 comm="/usr/sbin/NetworkManager --no-daemon "))


** (nm-applet:17738): WARNING **: _nm_object_get_property: Error getting 'State' for /org/freedesktop/NetworkManager: (9) Rejected send message, 3 matched rules; type="method_call", sender=":1.97" (uid=500 pid=17738 comm="nm-applet ") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination="org.freedesktop.NetworkManager" (uid=0 pid=1189 comm="/usr/sbin/NetworkManager --no-daemon "))


** (nm-applet:17738): WARNING **: _nm_object_get_property: Error getting 'ActiveConnections' for /org/freedesktop/NetworkManager: (9) Rejected send message, 3 matched rules; type="method_call", sender=":1.97" (uid=500 pid=17738 comm="nm-applet ") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination="org.freedesktop.NetworkManager" (uid=0 pid=1189 comm="/usr/sbin/NetworkManager --no-daemon "))

** (notification-daemon:17736): DEBUG: Adding id 1
** (notification-daemon:17736): DEBUG: Adding id 2
** (notification-daemon:17736): DEBUG: Already showing bubbles
** Message: applet now embedded in the notification area

** (nm-applet:17738): WARNING **: _nm_object_get_property: Error getting 'State' for /org/freedesktop/NetworkManager: (9) Rejected send message, 3 matched rules; type="method_call", sender=":1.97" (uid=500 pid=17738 comm="nm-applet ") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination="org.freedesktop.NetworkManager" (uid=0 pid=1189 comm="/usr/sbin/NetworkManager --no-daemon "))


** (nm-applet:17738): WARNING **: _nm_object_get_property: Error getting 'ActiveConnections' for /org/freedesktop/NetworkManager: (9) Rejected send message, 3 matched rules; type="method_call", sender=":1.97" (uid=500 pid=17738 comm="nm-applet ") interface="org.freedesktop.DBus.Properties" member="Get" error name="(unset)" requested_reply=0 destination="org.freedesktop.NetworkManager" (uid=0 pid=1189 comm="/usr/sbin/NetworkManager --no-daemon "))

** (notification-daemon:17736): DEBUG: Notification closed - removing from queue
** (notification-daemon:17736): DEBUG: Removing id 1
** (notification-daemon:17736): DEBUG: Bubble destroyed
** (notification-daemon:17736): DEBUG: Bubble destroyed
** (notification-daemon:17736): DEBUG: No queued notifications
'hanism' does not exist
** (notification-daemon:17736): DEBUG: Notification closed - removing from queue
** (notification-daemon:17736): DEBUG: Removing id 2
'' does not exist