Comment 2 for bug 590497

The problem persists when using the openjdk-6 packages from the ppa:

$ firefox
java version "1.6.0_18"
OpenJDK Runtime Environment (IcedTea6 1.8) (6b18-1.8-2lucid5)
OpenJDK Client VM (build 16.0-b13, mixed mode, sharing)
document not found!
cookie not found!
java.lang.InterruptedException
 at java.lang.Object.wait(Native Method)
 at java.lang.Object.wait(Object.java:502)
 at java.awt.EventQueue.invokeAndWait(EventQueue.java:995)
 at javax.swing.SwingUtilities.invokeAndWait(SwingUtilities.java:1351)
 at sun.applet.PluginAppletViewer.handleMessage(PluginAppletViewer.java:691)
 at sun.applet.PluginAppletViewer.handleMessage(PluginAppletViewer.java:649)
 at sun.applet.PluginStreamHandler.handleMessage(PluginStreamHandler.java:270)
 at sun.applet.PluginMessageHandlerWorker.run(PluginMessageHandlerWorker.java:82)
firefox-bin: ../../src/xcb_io.c:249: process_responses: Assertion `(((long) (dpy->last_request_read) - (long) (dpy->request)) <= 0)' failed.
Aborted

$ apt-cache policy openjdk-6-jre
openjdk-6-jre:
  Installed: 6b18-1.8-2lucid5
  Candidate: 6b18-1.8-2lucid5
  Version table:
 *** 6b18-1.8-2lucid5 0
        500 http://ppa.launchpad.net/openjdk/ppa/ubuntu/ lucid/main Packages
        100 /var/lib/dpkg/status
     6b18-1.8-0ubuntu1 0
        500 http://mirrors.dotsrc.org/ubuntu/ lucid/main Packages