Description of problem:
gnome-session should not depend on polkit-gnome but rather use the virtual provides "PolicyKit-authentication-agent". We cannot and should not hardcode a certain authentication-agent, otherwise we trigger problems as in bug 657006.
Version-Release number of selected component (if applicable):
This bug is not only about the bug 657006 but also because of the ongoing FESCo effort to get rid or dependency chain painpoints, see https://fedorahosted.org/fesco/ticket/345
After reading http://lists.fedoraproject.org/pipermail/devel-announce/2011-February/000758.html and the following discussion I doubt there is the slightest change for this change, so I'm going to close the bug myself.