rechecked in lucid. fails to download the jars

$ firefox
Looking for 0xa64783cc 0xa65407f0 0xb75fdbcc (document)
java version "1.6.0_18"
OpenJDK Runtime Environment (IcedTea6 1.8pre) (6b18~pre3-0ubuntu1)
OpenJDK Server VM (build 16.0-b13, mixed mode)
java.lang.InterruptedException: sleep interrupted
	at java.lang.Thread.sleep(Native Method)
	at sun.applet.PluginAppletViewer.handleMessage(PluginAppletViewer.java:629)
	at sun.applet.PluginStreamHandler.handleMessage(PluginStreamHandler.java:270)
	at sun.applet.PluginMessageHandlerWorker.run(PluginMessageHandlerWorker.java:82)
java.lang.InterruptedException: sleep interrupted
	at java.lang.Thread.sleep(Native Method)
	at sun.applet.PluginAppletViewer.handleMessage(PluginAppletViewer.java:674)
	at sun.applet.PluginAppletViewer.handleMessage(PluginAppletViewer.java:649)
	at sun.applet.PluginStreamHandler.handleMessage(PluginStreamHandler.java:270)
	at sun.applet.PluginMessageHandlerWorker.run(PluginMessageHandlerWorker.java:82)
java.lang.InterruptedException: sleep interrupted
	at java.lang.Thread.sleep(Native Method)
	at sun.applet.PluginAppletViewer.handleMessage(PluginAppletViewer.java:747)
	at sun.applet.PluginAppletViewer.handleMessage(PluginAppletViewer.java:649)
	at sun.applet.PluginStreamHandler.handleMessage(PluginStreamHandler.java:270)
	at sun.applet.PluginMessageHandlerWorker.run(PluginMessageHandlerWorker.java:82)
java.lang.ArrayIndexOutOfBoundsException: 5
	at sun.applet.PluginProxyInfoRequest.parseReturn(PluginProxyInfoRequest.java:65)
	at sun.applet.PluginStreamHandler.finishCallRequest(PluginStreamHandler.java:338)
	at sun.applet.PluginStreamHandler.handlePluginMessage(PluginStreamHandler.java:287)
	at sun.applet.PluginStreamHandler.handleMessage(PluginStreamHandler.java:208)
	at sun.applet.PluginMessageHandlerWorker.run(PluginMessageHandlerWorker.java:82)
java.lang.NullPointerException
	at sun.applet.AppletPanel.showAppletStatus(AppletPanel.java:943)
	at sun.applet.AppletPanel.run(AppletPanel.java:466)
	at java.lang.Thread.run(Thread.java:636)
Download error: /home/doko/.icedteaplugin/cache/http/www.slu.edu/classes/maymk/GeoGebra/geogebra_main.jar (No such file or directory)
Download error: jarFile not found: 1
/home/doko/.icedteaplugin/cache/http/www.slu.edu/classes/maymk/GeoGebra/geogebra_gui.jar (No such file or directory)
/home/doko/.icedteaplugin/cache/http/www.slu.edu/classes/maymk/GeoGebra/geogebra_cas.jar (No such file or directory)
/home/doko/.icedteaplugin/cache/http/www.slu.edu/classes/maymk/GeoGebra/geogebra_export.jar (No such file or directory)
/home/doko/.icedteaplugin/cache/http/www.slu.edu/classes/maymk/GeoGebra/geogebra_properties.jar (No such file or directory)
java.lang.ArrayIndexOutOfBoundsException: 5
	at sun.applet.PluginProxyInfoRequest.parseReturn(PluginProxyInfoRequest.java:65)
	at sun.applet.PluginStreamHandler.finishCallRequest(PluginStreamHandler.java:338)
	at sun.applet.PluginStreamHandler.handlePluginMessage(PluginStreamHandler.java:287)
	at sun.applet.PluginStreamHandler.handleMessage(PluginStreamHandler.java:208)
	at sun.applet.PluginMessageHandlerWorker.run(PluginMessageHandlerWorker.java:82)
Exception in thread "Thread-12" java.lang.NoClassDefFoundError: geogebra/e/m
	at geogebra.GeoGebraApplet.a(Unknown Source)
	at geogebra.GeoGebraApplet.a(Unknown Source)
	at geogebra.GeoGebraApplet.a(Unknown Source)
	at geogebra.f.run(Unknown Source)