Comment 7 for bug 38410

Problem still occurs in feisty and gutsy. It is caused by /etc/X11/Xsession.d/60sabayon_apply script. Because of 'set -e' at the beginning of Xsession script any command that won't return true will stop whole Xsession script. /usr/sbin/sabayon-apply returns 1 if the profile is not set for current user causing whole Xsession to stop with an error. As this error is non-fatal this shouldn't happen. As a workaround one can ensure that subject line will return true by adding '|| true' at the end of this line. It should look like:
if [ -x /usr/sbin/sabayon-apply ] ; then
    /usr/sbin/sabayon-apply || true
fi

This can be a bit problematic as all sabayon-apply errors (even fatal) would be thrown away, but I don't have idea how can it be solved differently.