When I go to this page: http://www.neoformix.com/Projects/BigSmall/index.html a few seconds after the applet loads, the monitor picture deforms, starts flickering, and ubuntu becomes unresponsive.
about:plugins in firefox shows the following:
GCJ Web Browser Plugin (using IcedTea) 1.0
File name: gcjwebplugin.so
The GCJ Web Browser Plugin (using IcedTea) executes Java applets.
MIME Type Description Suffixes Enabled
application/x-java-vm IcedTea class,jar Yes
application/x-java-applet IcedTea class,jar Yes
application/x-java-applet;version=1.1 IcedTea class,jar Yes
application/x-java-applet;version=1.1.1 IcedTea class,jar Yes
application/x-java-applet;version=1.1.2 IcedTea class,jar Yes
application/x-java-applet;version=1.1.3 IcedTea class,jar Yes
application/x-java-applet;version=1.2 IcedTea class,jar Yes
application/x-java-applet;version=1.2.1 IcedTea class,jar Yes
application/x-java-applet;version=1.2.2 IcedTea class,jar Yes
application/x-java-applet;version=1.3 IcedTea class,jar Yes
application/x-java-applet;version=1.3.1 IcedTea class,jar Yes
application/x-java-applet;version=1.4 IcedTea class,jar Yes
application/x-java-applet;version=1.4.1 IcedTea class,jar Yes
application/x-java-applet;version=1.4.2 IcedTea class,jar Yes
application/x-java-applet;version=1.5 IcedTea class,jar Yes
application/x-java-applet;version=1.6 IcedTea class,jar Yes
application/x-java-applet;jpi-version=1.6.0_00 IcedTea class,jar Yes
application/x-java-bean IcedTea class,jar Yes
application/x-java-bean;version=1.1 IcedTea class,jar Yes
application/x-java-bean;version=1.1.1 IcedTea class,jar Yes
application/x-java-bean;version=1.1.2 IcedTea class,jar Yes
application/x-java-bean;version=1.1.3 IcedTea class,jar Yes
application/x-java-bean;version=1.2 IcedTea class,jar Yes
application/x-java-bean;version=1.2.1 IcedTea class,jar Yes
application/x-java-bean;version=1.2.2 IcedTea class,jar Yes
application/x-java-bean;version=1.3 IcedTea class,jar Yes
application/x-java-bean;version=1.3.1 IcedTea class,jar Yes
application/x-java-bean;version=1.4 IcedTea class,jar Yes
application/x-java-bean;version=1.4.1 IcedTea class,jar Yes
application/x-java-bean;version=1.4.2 IcedTea class,jar Yes
application/x-java-bean;version=1.5 IcedTea class,jar Yes
application/x-java-bean;version=1.6 IcedTea class,jar Yes
application/x-java-bean;jpi-version=1.6.0_00 IcedTea class,jar Yes
please recheck with openjdk-6 (hardy or intrepid)