@Alexander, when you're saying "move away" it might be understood as if there is user controller interaction. However, my original bug report is stating that no action is being performed and no button is being pressed.
If you mean that the jump occurs as soon as the character is pushed out of the water, then ignore my comment 🙂
Bug reproduced on 1.7.5 creative mode.
Video demonstration:
http://www.youtube.com/watch?v=R_T1occhy9g
The "jumps" at the water edge are performed without pressing Spacebar.
I will try to reproduce on 14w10c but I experienced the same behavior on 1.7.5 the other day while working with water streams. Will try to create a repro.
Another example of the water-edge auto-jumping by walking between stream edges. Again, no Jump button was pressed this entire video, only WASD.
@Alexander
That's not precise. If you look at the repro I made originally, there was absolutely no interaction and no buttons were pressed.
http://www.youtube.com/watch?v=R_T1occhy9g