Following deadlock was observed:

2011-04-21 17:04:37
Full thread dump Java HotSpot(TM) Client VM (19.1-b02 mixed mode):

"Thread-10" prio=4 tid=0x19b72400 nid=0xa60 waiting for monitor entry [0x1aaaf000]
   java.lang.Thread.State: BLOCKED (on object monitor)
at com.sun.javaws.progress.PreloaderDelegate.getPendingException(Unknown Source)
- waiting to lock <0x094f9140> (a com.sun.javaws.progress.PreloaderDelegate)
at com.sun.javaws.progress.PreloaderDelegate.deliver(Unknown Source)
at com.sun.javaws.progress.PreloaderDelegate.markReady(Unknown Source)
- locked <0x093ff328> (a java.util.LinkedList)
at com.sun.javaws.progress.PreloaderDelegate.initPreloader(Unknown Source)
at sun.plugin2.applet.JNLP2Manager$2.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)

"thread applet-fish.FishApplication-1" prio=4 tid=0x19b73c00 nid=0x1758 waiting for monitor entry [0x1c7bf000]
   java.lang.Thread.State: BLOCKED (on object monitor)
at com.sun.javaws.progress.PreloaderDelegate.markReady(Unknown Source)
- waiting to lock <0x093ff328> (a java.util.LinkedList)
at com.sun.javaws.progress.PreloaderDelegate.handleEvent(Unknown Source)
- locked <0x094f9140> (a com.sun.javaws.progress.PreloaderDelegate)
at com.sun.javaws.LaunchDownload.validateResults(Unknown Source)
at com.sun.javaws.LaunchDownload.downloadJarFiles(Unknown Source)
at com.sun.javaws.LaunchDownload.downloadEagerorAll(Unknown Source)
at sun.plugin2.applet.JNLP2Manager.downloadResources(Unknown Source)
at sun.plugin2.applet.JNLP2Manager.prepareLaunchFile(Unknown Source)
at sun.plugin2.applet.JNLP2Manager.loadJarFiles(Unknown Source)
at sun.plugin2.applet.Plugin2Manager$AppletExecutionRunnable.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)