Hi,
I have check the new Mod Version and have found many of Placeable Blocksand Items what with the new Update 1.8.1 version water surfaces have. I have 7 Pictures who you can this water surfaces good see. By the door can you this in all times see I have open the door and the water surfaces walk with the door movement and by the Pistons is it only then the Piston place by solid block.

I hope you can this for the all doors, Tripwire Hook, The Sign, The Pistons and the Banners fix

The Only what you must is a area of water have and the Block and items place.

The Water surfaces of the Pistons work only then he was activate .
But I think it is what you have in the Coding have fix for the last hours. I hope it is this and you can give me a 1.8.1b version and I will check this.

done :)