I am using an Ubuntu installation with Xfce as desktop environment on my Thinkpad E520. After installing updates (including a reboot) my power manager stopped working and I also get crash reports about the network manager on every start. I tried reinstalling (sudo apt-get remove, then install) xfce4-power-manager, but it didn't help. Here are some screenshots:
(The text says "Can't establish connection to the power manager for Xfce")
Any ideas how to fix this problem?