Comment 145 for bug 401823

Update.
Not sure if it's related.
I've found the multiple lines '(firefox-bin:1527): Gdk-WARNING **: XID collision, trouble ahead'
only appear when a java applet starts. Java brings up CPU to 100.
http://javatester.org/version.html

xession-errors says at this point:
## multiple lines
(firefox-bin:1527): Gdk-WARNING **: XID collision, trouble ahead
java version "1.6.0_18"
OpenJDK Runtime Environment (IcedTea6 1.8) (6b18-1.8-0ubuntu1)
OpenJDK 64-Bit Server VM (build 14.0-b16, mixed mode)
java.lang.InterruptedException: sleep interrupted
 at java.lang.Thread.sleep(Native Method)
 at sun.applet.PluginAppletViewer.handleMessage(PluginAppletViewer.java:735)
 at sun.applet.PluginAppletViewer.handleMessage(PluginAppletViewer.java:649)
 at sun.applet.PluginStreamHandler.handleMessage(PluginStreamHandler.java:270)
 at sun.applet.PluginMessageHandlerWorker.run(PluginMessageHandlerWorker.java:82)

Exception in thread "Thread-14" java.lang.NullPointerException
 at sun.applet.AppletPanel.showAppletStatus(AppletPanel.java:947)
 at sun.applet.AppletPanel.run(AppletPanel.java:607)
 at java.lang.Thread.run(Thread.java:636)