The easiest way to reproduce bug:

1. go up to the tower
2. run backwards and in the moment of hitting the wall release back button and start rotating right, during the rotation press right arrow (to move right)

Example - http://youtu.be/v-rBT6n6JAQ

Looks like the issue is related to rotation movement prediction and collisions.

Tested on alpha Dev build 0.55.103960

I wonder if vsync is important....

Looks like there is an issue with player model collision detection when being inside the guard tower - probably the walls are just too thin, and the falling out happens when standing still and rotating in place.

Also for me, the easiest places to fall out are on the corners.