SwingSet JComboBox is throwing java.awt.AWTEventMulticaster exception on Solaris 2.6 with JDK-1.2fcs-L.

Steps to Reproduce:
0) Launch SwingSet with the above configuration.
1) Go the the ComboBox tabbed pane.
2) Use the ComboBoxes. Enter some text into the editable ones.
3) Use the bottom right ComboBox.
RESULT: It throws the following exceptions. Also, occasionally the window for the ComboBox won't go away even while in other apps.




Exception occurred during event dispatching:
java.lang.ClassCastException: java.awt.AWTEventMulticaster
        at java.awt.Toolkit$ToolkitEventMulticaster.remove(Compiled Code)
        at java.awt.Toolkit.removeAWTEventListener(Compiled Code)
        at java.awt.LightweightDispatcher$2.run(Compiled Code)
        at java.security.AccessController.doPrivileged(Native Method)
        at java.awt.LightweightDispatcher.stopListeningForOtherDrags(Compiled Code)
        at java.awt.LightweightDispatcher.trackMouseEnterExit(Compiled Code)
        at java.awt.LightweightDispatcher.processMouseEvent(Compiled Code)
        at java.awt.LightweightDispatcher.dispatchEvent(Compiled Code)
        at java.awt.Container.dispatchEventImpl(Compiled Code)
        at java.awt.Window.dispatchEventImpl(Compiled Code)
        at java.awt.Component.dispatchEvent(Compiled Code)
        at java.awt.EventQueue.dispatchEvent(Compiled Code)
        at java.awt.EventDispatchThread.run(Compiled Code)