I was playing around with water today in the game and I noticed that it either doesn't react to pressure or doesn't create pressure.  With water filling up a tank with a tube going out and up, the water only filled the tube up to the top of the tube.  As the water filled up more and more of the tank, it should have been moving up the vertical tube as well, but it didn't. 

It would be nice if this behaviour was fixed.

Oh!  Good to know!  Thanks!