SwingSet3 crashes on second launch using jdk7-hs16 with MVM support...

¿jmelvin@jmelvin-ubuntu:/mnt/shared/md$ ${JAVA_HOME}/bin/java -version
java version "1.7.0-internal"
Java(TM) SE Runtime Environment (build 1.7.0-internal-jprtadm_2010_07_02_22_00-b00)
Java HotSpot(TM) Client VM with MultiApp Extensions enabled (build 16.0-b13-201007030033.ap154020.mvm, mixed mode)

To reproduce, unzip the attached demo.zip and...

$ java -XRunMServer &
$ java -XUseMServer -jar ./demo/jfc/SwingSet3/SwingSet3.jar &
$ java -XUseMServer -jar ./demo/jfc/SwingSet3/SwingSet3.jar &

First launch is fine. Second launch, the GUI never shows and the following
is written to the console...

¿Jul 22, 2010 4:25:36 PM org.jdesktop.application.Application$1 run
SEVERE: Application class com.sun.swingset3.SwingSet3 failed to launch
java.lang.NullPointerException
at com.sun.swingset3.codeview.CodeViewer.getString(CodeViewer.java:266)
at com.sun.swingset3.codeview.CodeViewer$FirstSnippetAction.<init>(CodeViewer.java:739)
at com.sun.swingset3.codeview.CodeViewer.initActions(CodeViewer.java:280)
at com.sun.swingset3.codeview.CodeViewer.<init>(CodeViewer.java:163)
at com.sun.swingset3.SwingSet3.createMainPanel(SwingSet3.java:398)
at com.sun.swingset3.SwingSet3.startup(SwingSet3.java:305)
at org.jdesktop.application.Application$1.run(Application.java:171)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:649)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:255)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:170)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:155)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:136)
Exception in thread "AWT-EventQueue-0" java.lang.Error: Application class com.sun.swingset3.SwingSet3 failed to launch
at org.jdesktop.application.Application$1.run(Application.java:177)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:251)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:649)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:255)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:170)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:160)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:155)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:136)
Caused by: java.lang.NullPointerException
at com.sun.swingset3.codeview.CodeViewer.getString(CodeViewer.java:266)
at com.sun.swingset3.codeview.CodeViewer$FirstSnippetAction.<init>(CodeViewer.java:739)
at com.sun.swingset3.codeview.CodeViewer.initActions(CodeViewer.java:280)
at com.sun.swingset3.codeview.CodeViewer.<init>(CodeViewer.java:163)
at com.sun.swingset3.SwingSet3.createMainPanel(SwingSet3.java:398)
at com.sun.swingset3.SwingSet3.startup(SwingSet3.java:305)
at org.jdesktop.application.Application$1.run(Application.java:171)
... 8 more

Attached is the demo directory that includes the SwingSet3 jar. Also, I've
attached the source code for SwingSet3 as well for reference. Happens on
both Ubuntu Linux and Windows XP.