After upgrading to 10.04, I discovered that the medibuntu (extra storage for things like ffmpeg, restricted extras, etc.) is down. I don't know how long it will be this way, but here's the workaround for connecting to the mirror: Add these lines to the end of /etc/apt/sources.list #Medibuntu deb http://mirrors.ucr.ac.cr/medibuntu/ hardy free non-free deb-src http://mirrors.ucr.ac.cr/medibuntu/ hardy free non-free run the following: wget -q http://medibuntu.sos-sts.com/repo/medibuntu-key.gpg -O- | sudo apt-key add then run the following: sudo apt-get update