Comment 12 for bug 591129

Maybe the problem in bigger than that, because I have the same problem after reinstall pulseaudio (because headphones don't mute speakers) startup applications doesn't work (specially nm-applet --sm-disable is the most important, maybe the policy kit), Installation by Ubuntu software center the same problem than here, In Ubuntu tweak I cannot unlock anything and some administratives task cannot do since pulse audio uninstall for instance, I cannot change my own user privileges or activate propietary drivers and my folders (Documents, Downloads, Public, etc) in the left panel of Nautilis dissapear and cannot put them n its original place, among others task and weird things. Take in account that my user is a sudoer and all this stuff worked before. Another friend had the same problem and follow the steps to update pulse audio and the same.

I try removing completely (even home directory) and recreate my user from another sudoer and again the same problems. But if I create a new administrator user, it have everything correct, something in another place that have a record for users permissions or something is the problem, because even re creating the problematic user cannot recover its original situation.

I expect that this give you some clues about this problem or still better maybe exists a solution from another problem described here.