Why does BEAST sometimes crash with a segmentation fault on startup?
This was due to a bug in the X Keyboard extension. BEAST tries to figure the country specifics of the keyboard layout, using the XKB extension. Apparently, there are some allocation problems in XkbFreeKeyboard() or XkbFreeClientMap() in libX11, which can cause random crashes. Usually BEAST will run fine when restarted. UPDATE: Recent versions of XKB seem to have fixed this problem.