Session dies after logout

Hi there. After my latest update on some debian machines we use at work (mostly
running testing), all screen sessions die after users log out.

[Please cc me, since I'm not subscribed to the list]

I've recompiled version 4.3.1-3 to show debug logs; debian's stable version
4.2.1-3+deb8u1 also dies, although I did not try to recompile it.

Here's the log right after a user logs out (using debian's system-wide
screenrc):

  FinitHandler called, sig 15.
  Finit(1);
  FreeWindow 0
  RemoveUtmp slot=0
  Deq event fd 7 type 1 queued 1
  Deq event fd 7 type 2 queued 1
  Deq event fd 0 type 0 queued 0
  ChangeWindowSize from (209,67)+1024 to(0,0)+0
  fy 1090 ty -1
  KillLayerChain 0x53c48748
  Deq event fd -1 type 1 queued 0
  Deq event fd -1 type 2 queued 0
  Deq event fd 0 type 0 queued 0
  Deq event fd 0 type 0 queued 0
  Deq event fd 0 type 0 queued 0
  Deq event fd 0 type 0 queued 0
  we unlink(/var/run/screen/S-vilanova/693.pts-0.obelix)


Thanks,
  Lluis