Oh goodie. I decided to try the new xcb stuff so I turned on the xcb use flag in libX11 and mesa just to find out that java from sun does not work with it. Proprietary software is so much fun. Luckily a change is happening for the better as all of Sun’s java implementation will be released under the GPL in the future.
java: xcb_xlib.c:50: xcb_xlib_unlock: Assertion `c->xlib.lock' failed.