This seems to be related to to running a VNCServer desktop. My Maverick runs as a Xen Domu without a real GPU. Some additional details are now in the upstream bug https://bugzilla.gnome.org/show_bug.cgi?id=638792.
My vnc session started with
vnc4server :0 -name MacDesktop -geometry 1680x1050 -depth 16
This seems to be related to to running a VNCServer desktop. My Maverick runs as a Xen Domu without a real GPU. Some additional details are now in the upstream bug https:/ /bugzilla. gnome.org/ show_bug. cgi?id= 638792.
My vnc session started with
vnc4server :0 -name MacDesktop -geometry 1680x1050 -depth 16