Java Bug
From Tim's Wiki
Problem:
xcb_xlib.c:50: xcb_xlib_unlock: Assertion 'c->xlib.lock' failed
Fix:
sed -i 's/XINERAMA/FAKEEXTN/g' /usr/lib/jvm/sun-jdk-1.6/jre/lib/i386/xawt/libmawt.so
sed -i 's/XINERAMA/FAKEEXTN/g' /usr/lib/jvm/sun-jdk-1.5/jre/lib/i386/xawt/libmawt.so