I'm hoping that the upgrade would have removed Upstart and installed Systemd,
but if not then that might be behind some of the booting confusion.
I actually didn't bother with apt-get upgrade and went straight for
dist-upgrade and it seems to have removed some packages that weren't present
in the Flidas repos. I think one of the ones that had issues was
'gnome-session', which sounds like it might fairly important.
So, how do I fix the issue with the gpg keys? Do I need to download a new key
file from somewhere for Flidas?