Gnome Shell Issues - Frequent Crashing

[cjac76 comcast net]

I am very excited about the upcoming changes with gnome 3. I have been using Ubuntu since 7.04. I had been using the version of gnome-shell from the ubuntu repository that is really outdated. I compiled the latest version yesterday with jh build and got it running after removing canberra.gtk. I am really happy with the way things are progressing, but it seems to crash a lot. Below is my terminal output when I start gnome-shell. Can anyone help me with the error messages?

Gtk-Message: Failed to load module "canberra-gtk-module"
Window manager warning: Log level 16: Accessibility: org.a11y.atspi schema not found. Are you sure that at-spi or at-spi2 is installed on your system?
Window manager warning: Log level 16: Accessibility: invalid module path (NULL)
Window manager warning: Log level 16: Accessibility: error loading the atk-bridge. Although the accessibility on the system is enabled and clutter accessibility is also enabled, accessibility support on GNOME Shell will not work

(mutter:8714): libecal-WARNING **: Cannot get cal from factory: No backend factory for 'local' of 'VTODO'

(mutter:8714): CalendarClient-WARNING **: Could not load source 'Personal' from 'system'

(mutter:8714): Bluetooth-DEBUG: adding killswitch idx 2 state KILLSWITCH_STATE_SOFT_BLOCKED
(mutter:8714): Bluetooth-DEBUG: killswitch 2 is KILLSWITCH_STATE_SOFT_BLOCKED
(mutter:8714): Bluetooth-DEBUG: killswitches state KILLSWITCH_STATE_SOFT_BLOCKED
(mutter:8714): Bluetooth-DEBUG: killswitch 2 is KILLSWITCH_STATE_SOFT_BLOCKED
(mutter:8714): Bluetooth-DEBUG: killswitches state KILLSWITCH_STATE_SOFT_BLOCKED
      JS LOG: GNOME Shell started at Thu Feb 17 2011 11:28:03 GMT-0600 (CST)

(mutter:8714): GdmUser-WARNING **: Unable to load CK history: no seat-id found

** (ck-history:8727): WARNING **: Unknown option --since=2010-12-19T17:28:04.909356Z

Thanks,
Jason