It looks like an old version of libbind is left installed, which depends on an old version of libdns which depends on the conflicting version of libisc. So basically what I did is I looked at what packages conflicted when trying to remove libisc50, and removed them as well. That normally can quickly get ridiculous, since eventually you will run into a package that depends on a lot of others, but since nothing seems to be using the libbind9-50 package, it's a pretty clean fix.
tl;dr: # apt-get -f --purge autoremove libisc50- (read a bunch of conflicts) # apt-get -f --purge autoremove libisc50- libbind9-50- \ libisccfg50- libdns53- libdns55- libisccc50- (sip tea, adjust monacle) -- To UNSUBSCRIBE, email to debian-bugs-rc-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org