Dear Maintainer, Even after a clean install of Debian (from a AMD64 USB install if that matters), /etc/apt/sources.list always seems to end up with two entries for the cdrom as a source (one commented and one not). This is confusing, especially to Debian newbies when using software like software-properties-gtk. I have always seen this problem with Debian even with Squeeze. I always install from a USB drive so they might be correlated. By the time of the bug report I have enabled contrib and non-free and added a ton of software but otherwise I have no messed with repository stuff.