If you turn on the xcb use flag in libX11 and mesa you will find out
that nothing graphical in java does not work.

java: xcb_xlib.c:50: xcb_xlib_unlock: Assertion `c->xlib.lock' failed.

This problem is present in at least 1.5*. Haven't tested other versions
yet and don't have the time today either.

Regards,
Petteri