I was trying to get musepack encoder support built into ffmpeg today, and I inadvertently broke a few things but I'm not sure exactly which package I installed which broke them. How can I remove ALL packages I installed today, and start again from scratch more carefully?
I can see a list of them in "Ubuntu Software Center" under today's date in the "History", but I don't want to go through uninstalling them one-by-one, because there are hundreds to do.
