For the last week, I have been getting this when starting Thunderbird, which starts slowly but OK and with a diminished window (although I always closeTB on fullscreen)
This is still open on 13.04 (first reported in 2011)
GLib-CRITICAL **: g_slice_set_config: assertion 'sys_page_size == 0' failed
AddressbooksSynchronizer 1.1.2 appName=Thunderbird appVersion=24.6.0
Gtk-Message: (for origin information, set GTK_DEBUG): failed to retrieve property
GtkRange::activate-slider' of typegboolean' from rc file value "((GString*) 0xadead7b0)" of type `GString'