So, I'm experiencing the following issue with 12.04 - installing/removing software from the Software Center doesn't work. I find the app I need/don't need click install/remove and nothing happens. I checked if it's apt issue, but it is not. There are also no errors with the repositories and no broken packages. I can install/remove packages from "apt-get" or Synaptic just fine. If this will be of any assistance - starting the Software Center as root (with gksu infront) allows me to install/remove apps.