I recently switched my in-laws from Windows 7 to Ubuntu 13.04 after a nasty incident with the moneypak virus. Since their computer use is limited to skype and webmail, everything but Skype is working nicely.
Whenver I start a video call, the camera does not activate. The OS detects the camera and I can test the camera in the options window. However, when I click the "turn on video" button in a call, nothing happens on the computers' side. It's as if Skype forgets to tell the camera to activate.
I installed the skype 126.96.36.199 for Ubuntu 12.04 on the computer.