Classic Jeb doors that were working up through at least version 1.8.1 are no longer working. The pistons on the right facing outward (when facing the wall) don't stick and so don't retract. The blocks on the left don't stick to the pistons so the blocks don't retract. I have screen shots. I started building this world in 1.7.10 and the two sets of Jeb doors were working fine and even when I changed to 1.8.1. I went back to work on it in 1.8.8 and now they're not working. But only when the pistons are on the south side of the hidden wall.