I am running on Ubuntu Linux 13.04, and my computer is only 1-2 months old, and absolutely positively 100% meets the system requirements. I can launch the standalone version perfectly every single time. However, I need to launch through Kongregate to use my Kreds to purchase energy. When I try to launch the game through Kongregate, I get this error:

java version "1.7.0_25"
OpenJDK Runtime Environment (IcedTea 2.3.10) (7u25-2.3.10-1ubuntu0.13.04.2)
OpenJDK 64-Bit Server VM (build 23.7-b01, mixed mode)
java.lang.ExceptionInInitializerError
at com.threerings.getdown.Log.(Unknown Source)
at com.threerings.getdown.launcher.GetdownAppletConfig.(Unknown Source)
at com.threerings.getdown.launcher.GetdownAppletConfig.(Unknown Source)
at com.threerings.getdown.launcher.GetdownApplet.init(Unknown Source)
at sun.applet.AppletPanel.run(AppletPanel.java:436)
at java.lang.Thread.run(Thread.java:724)
Caused by: java.lang.NullPointerException
at com.a.c.c.a(Unknown Source)
at com.a.c.u.a(Unknown Source)
at com.a.c.t.a(Unknown Source)
at com.a.c.s.(Unknown Source)
... 6 more

Thoughts? I've tried uninstalling and reinstalling SK, Java, and IcedTea so far.