I have this bug too. I overwrote sources.list with a default version of the file (I used this https://wiki.debian.org/SourcesList) Then when I run synaptic it seems to revert sources.list to a version that has lines punched out.
I have this bug too. I overwrote sources.list with a default version of the file (I used this https://wiki.debian.org/SourcesList) Then when I run synaptic it seems to revert sources.list to a version that has lines punched out.