Applications hang/crash JVM on exit with JavaFX either as pure app or embedded in Swing.

This error is consistent and occurs whether I compile test code, as in the JavaFX API (javafx.embed.swing) example, or by running the pre-compiled samples that are downloaded (e.g. Ensemble.jar)

Output is always similar to the following:

#
# A fatal error has been detected by the Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0x00007f5596e14c58, pid=26214, tid=140005889730304
#
# JRE version: 7.0_10-b18
# Java VM: Java HotSpot(TM) 64-Bit Server VM (23.6-b04 mixed mode linux-amd64 compressed oops)
# Problematic frame:
# C [libX11.so.6+0x33c58] XQueryExtension+0x28
#