sun-java6-plugin crashes with firefox

[phlegm]

Binary package hint: firefox

Running Gutsy and the latest updates.
When I try to visit a java page I get nothing in the browser.
If I go to a page with java in it like http://www.java.com/en/download/help/testvm.xml I get an error when starting firefox from a console.

VM did not start up properly
java_vm: xcb_xlib.c:50: xcb_xlib_unlock: Assertion `c->xlib.lock' failed.
Could not read ack from child process
Plugin: Java VM process has died.
plugin: java process died due to signal 6
  a core file was generated
Could not start JavaVM!

about:plugins shows the following
Java(TM) Plug-in 1.6.0_02-b05

    File name: libjavaplugin_oji.so
    Java(TM) Plug-in 1.6.0_02

MIME Type Description Suffixes Enabled
application/x-java-vm Java Yes
application/x-java-applet Java Yes
application/x-java-applet;version=1.1 Java Yes
application/x-java-applet;version=1.1.1 Java Yes
application/x-java-applet;version=1.1.2 Java Yes
application/x-java-applet;version=1.1.3 Java Yes
application/x-java-applet;version=1.2 Java Yes
application/x-java-applet;version=1.2.1 Java Yes
application/x-java-applet;version=1.2.2 Java Yes
application/x-java-applet;version=1.3 Java Yes
application/x-java-applet;version=1.3.1 Java Yes
application/x-java-applet;version=1.4 Java Yes
application/x-java-applet;version=1.4.1 Java Yes
application/x-java-applet;version=1.4.2 Java Yes
application/x-java-applet;version=1.5 Java Yes
application/x-java-applet;version=1.6 Java Yes
application/x-java-applet;jpi-version=1.6.0_02 Java Yes
application/x-java-bean Java Yes
application/x-java-bean;version=1.1 Java Yes
application/x-java-bean;version=1.1.1 Java Yes
application/x-java-bean;version=1.1.2 Java Yes
application/x-java-bean;version=1.1.3 Java Yes
application/x-java-bean;version=1.2 Java Yes
application/x-java-bean;version=1.2.1 Java Yes
application/x-java-bean;version=1.2.2 Java Yes
application/x-java-bean;version=1.3 Java Yes
application/x-java-bean;version=1.3.1 Java Yes
application/x-java-bean;version=1.4 Java Yes
application/x-java-bean;version=1.4.1 Java Yes
application/x-java-bean;version=1.4.2 Java Yes
application/x-java-bean;version=1.5 Java Yes
application/x-java-bean;version=1.6 Java Yes
application/x-java-bean;jpi-version=1.6.0_02 Java Yes

[phlegm (daveshome)]

Found out that a script I was using to compile the latest compiz is also compiling libx11-xcb1 since the version in Gutsy doesn't support xcb. This breaks java.

[phlegm (daveshome)]

Found a fix/hack to make my java work again. This is from one of the gentto forums.
sudo sed -i 's/XINERAMA/FAKEEXTN/g' /usr/lib/jvm/java-6-sun-1.6.0.03/jre/lib/i386/xawt/libmawt.so