This issue has reared its head just today. the Ubuntu Software Centre seems to be broken
It loads up a blank window with the title "Ubuntu Software Centre" but doesn't do anything else after that.
Here is the console output:
rymate@rymate-Aspire-5551:~$ software-center 2011-12-26 16:21:10,618 - softwarecenter.ui.gtk3.em - INFO - EM's: 17 15 21 rymate@rymate-Aspire-5551:~$
Anything I can do to fix? Or am I gonna have to use synaptic package manager to install stuff.