I just experienced this in Minecraft 1.4.7 . My boat was in flowing water block, being pushed into grass blocks (I thought this would be a good way to dock the boat). I got in the boat and attempted to push off by pressing "w" key. Nothing happened initially, so I continued holding down the movement keys for a few moments. Without warning, I got the "Hit the ground to hard" message on the death screen. I have not been able to reproduce.
Jams Helfer
I just experienced this in Minecraft 1.4.7 . My boat was in flowing water block, being pushed into grass blocks (I thought this would be a good way to dock the boat). I got in the boat and attempted to push off by pressing "w" key. Nothing happened initially, so I continued holding down the movement keys for a few moments. Without warning, I got the "Hit the ground to hard" message on the death screen. I have not been able to reproduce.