Problem appears since update aquatic beta and is not fixed till the latest (1.5.0.1) release.
No, it happens even if i am the only player in the world. You can try downloading the map above, and it will crash immediately when opening. (because i am in the crashing region). the crash only happens to some places in the world. In other places, you don't crash at all. But when u fly near those crashing regions, game freezes and crashes.
It happens to me. When I go near pistons (and they start to work as simulation begins), the game crashes.
Same thing happens to me. In order to play in the map, i have to AVOID entering some regions. Weird
But things in the region can actually be rendered, i just cant enter.
I have a similar problem, but it may not be related to Redstone. My problem is that when entering a certain region or chunk area on the map, the game will crash.