Ok, 188.8.131.52-pclos6.bfs is installed. I'll try a couple of more later on.
Just to clarify, my sources.list was up to date, but I hoped that running the program may fix the apt database somehow. Also, mkinitrd was obviously installed, and if it was needed to be run, it could have been run from a terminal. But, just in case I was missing any details, I assumed that the install script would get it right.
(I wrote this before your post AS, but thanks for the feedback.)