Possible Duplicate:
“method driver /usr/lib/apt/methods/https could not be found” update error
When I try to install something from Ubuntu Software center or synaptic, a message pops up saying
E:Method /usr/lib/apt/methods/ did not start correctly
After cleaning apt, updating etc, the problem persists. I didn't find nothing strange on my sources.list. I'm running Ubuntu 12.04. What could be causing this error?