Offiical Apt Repository Back
After several years of being unsupported the official apt repository, http://apt.tvheadend.org, is now back on-line.
Unfortunately in my haste to get this up and running I had forgotten that many users may still be porting at the out of date repository and relying on it not updating their systems.
Unfortunately as now documented in AptRepository, the stable repository now includes a nightly build of the stable branch, which at time of writing is release/4.0. And as a result of my haste this has caused many people's systems to be updated from a very old 3.4 to 4.0.8.
I apologise profusely for this. I would normally have ensured plenty of warning, but was simply eager to do something useful after nearly 2 years away from the project.
I can only say that I personally upgraded to a 4.0 release a few months back and before that was using something very similar to 4.0 for some 2 years (and a I'm not usually an early adopter).
While it does have a considerably different configuration system (mostly my fault!), I can honestly say that in my absence perexg has done an excellent job in keeping the project going and has been improving and fixing things left, right and centre. So I suggest you give it a go!
If people do feel particularly aggrieved I will consider creating a special case 3.4 repo that people can use to downgrade, and I believe your configuration should have been backed up during the upgrade process so recovery shouldn't be too traumatic. But eventually you're probably going to want to update to keep up with latest changes, particularly if you integrate with Kodi (where there are many improvements).