Crouching and placing liquids at the edge of a block seems broken.
I expected it to place the source block on the outlined solid block.
Instead, it places the source block, and then the source block slides into the next block.
Steps to Reproduce:
1. Aim for a blocks edge, such that crouching will highlight it, but uncrouched will highlight the next block,
2. crouch
3. place a liquid source block on it.
It seems to place and then slide it to where it thinks it should be.
Environment
Windows 7, 64 bit, multiplayer server with no noticeable lag.
(tested in SP at the prompting of the servers owner, seems consistent, adding new SS's)
Reopened MC-1893, copied and pasted your description there if you don't mind 😉.