A latter bug was found in getting the failsafe session up, since dexconf no longer generates xorg.conf's, it also can't be used to generate the failsafe mode's xorg.conf. I've uploaded a change which just generates a standard xorg.conf (this is pretty much all dexconf was doing last release anyway). So recommend the fix for bug 477149 go in along with this one.
A latter bug was found in getting the failsafe session up, since dexconf no longer generates xorg.conf's, it also can't be used to generate the failsafe mode's xorg.conf. I've uploaded a change which just generates a standard xorg.conf (this is pretty much all dexconf was doing last release anyway). So recommend the fix for bug 477149 go in along with this one.