Not a bug list

You will find a list of frequently misunderstood features.

Gear Box

Does not receive mechanical Power. A gear box does have a special Input side (The one with the Arrows pointing inwards). You must face it towards the energy source.
Accepts input only from one side. A gear box just works that way in real life too.
Will not start when powered by redstone. Redstone power will disengage the gears effectively stopping the energy transmission. You need to power it with mechanical power.
Gear boxes placed next to each other will not transmit mechanical power. That's intentional.

Destroys any food when Dung is put into it. Yes.. would you want to eat something that has been cooked with Dung in the same Cauldron?
Will not start cooking when powered by redstone. You have to put a heat source under it.

Breaks if one puts more than three in a row. The Axle is to long. Put a Gear Box in between.

Can not be placed. It is lager than a normal Block. (5x5x1 Blocks) The Space must be free of anything. (no Torches!)
Will not turn. It needs flowing water at the bottom to turn.

Can not be placed. It is lager than a normal Block. (15x15x1 Blocks) The Space must be free of anything. (no Torches!)
Will not turn. It needs the sky above it.
Breaks frequently. It needs to be protected from Weather (Rain, Storms, Snow) so place a Detector Block so it is facing upwards and sees the sky. Connect it's Output to the Gear Box next to the windmill.