Comment 7 for bug 163277

I had the same thing happen in hardy heron and it crashed synaptic so I ended up having to reinstall the whole operating system
“E:Type '—21:25:04--' is not known on line 1 in source list /etc/apt/sources.list.d/medibuntu.list
E:The list of sources could not be read.
Go to the repository dialog to correct the problem.
E: _cache->open() failed, please report.”