Hopefully the latter - would be absolutely foolish to do the former and take a step back to pre-PDC days.
The cynic inside me might say they are deliberately damaging the functionality of PVRs,
to drive people towards watching either live, or on Awful (or whatever their on line player is called)
Fine, but stick to shows that are available on All4. Don't do it to those that aren't.
It's not fine at all. Assuming it's a fault (which I think it is) C4 should have to correct measures in place to realise that there is a fault, inform those that have complained etc, and get Ericcson to fix it.
If they have abandoned the feature, then come clean and say so.
BTW, a friend with Sky+ says his box recorded Sunday's Homeland perfectly, so this seems to be only affecting DTT