If you experience the following after a(nother) java-app crashed:
java: xcb_xlib.c:50: xcb_xlib_unlock: Assertion `c->xlib.lock’
Gentoo-Users can do the following (as root)
locate libmawt.so | grep “/opt/sun-j.*/lib/i386/.*libmawt.so” | xargs sed -i ‘s/XINERAMA/FAKEEXTN/g’
(Another case of IF I ALTERED MY GOOGLE-STRING EARLIER)