Hi,
just a brief update to say that the regression procedure actually turned out to be painless, helped by the fact that I maintain my own local partial mirrors, so I already had the old V3.5.12 .debs.
Fwiw, I just copied all of the 3.5.12 .debs into a temp folder, cd'd in to that folder and then ran "dpkg -i *.deb"
There were no problems regarding installing thepackages in order, as can sometimes be the case.
Ymmv with other distros though.
Regards,
LeeE