SEGV on Sol while changing values in JComboBox/JMenu used in Java2Demo

Build : 'K' (Verified 'I' to be ok, Introduced in 'J' build)
OS : Sol 2.6, 2.5.1
App : Java2Demo (specifically: Mix.Balls)

By pulling down the JComboBox to change values the following SEGV results:
(does not SEGV when values changed by assignments. Must phyisically pull down the combobox and set to different value to induce the problem.)

Steps:
   1. Launch Java2Demo
   2. goto Mix tab
   3. in the Bouncing Balls demo, chang values in the pull down menu


SIGSEGV 11* segmentation violation
    si_signo [11]: SIGSEGV 11* segmentation violation
    si_errno [0]: Error 0
    si_code [1]: SEGV_MAPERR [addr: 0x340000C]

        stackpointer=eaab17c8

Full thread dump Classic VM (JDK-1.2.1-K, green threads):
    "BezierScroller Demo" (TID:0xebc318d0, sys_thread_t:0xad94e8, state:CW) prio
=1
        at java.lang.Thread.sleep(Native Method)
        at DemoSurface.run(DemoSurface.java, Compiled Code)
        at java.lang.Thread.run(Thread.java, Compiled Code)
    "Balls Demo" (TID:0xebc2dbc8, sys_thread_t:0xad61a0, state:R) prio=1
        at javax.swing.RepaintManager.addDirtyRegion(RepaintManager.java, Compil
ed Code)
        at javax.swing.JComponent.repaint(JComponent.java, Compiled Code)
        at java.awt.Component.repaint(Component.java, Compiled Code)
        at DemoSurface.run(DemoSurface.java, Compiled Code)
        at java.lang.Thread.run(Thread.java, Compiled Code)
    "PerformanceMonitor" (TID:0xebc950f8, sys_thread_t:0xad2e58, state:CW) prio=
1
        at java.lang.Thread.sleep(Native Method)
        at PerformanceMonitor$Surface.run(PerformanceMonitor.java, Compiled Code
)
        at java.lang.Thread.run(Thread.java, Compiled Code)
    "MemoryMonitor" (TID:0xebc90df0, sys_thread_t:0xace7e8, state:CW) prio=1
        at java.lang.Thread.sleep(Native Method)
        at MemoryMonitor$Surface.run(MemoryMonitor.java, Compiled Code)
        at java.lang.Thread.run(Thread.java, Compiled Code)
    "TimerQueue" (TID:0xebbebf20, sys_thread_t:0xac8228, state:CW) prio=6
        at java.lang.Object.wait(Native Method)
        at javax.swing.TimerQueue.run(TimerQueue.java, Compiled Code)
        at java.lang.Thread.run(Thread.java, Compiled Code)
    "Screen Updater" (TID:0xebccb168, sys_thread_t:0x683550, state:CW) prio=4
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java, Compiled Code)
        at sun.awt.ScreenUpdater.nextEntry(ScreenUpdater.java, Compiled Code)
        at sun.awt.ScreenUpdater.run(ScreenUpdater.java, Compiled Code)
    "AWT-Motif" (TID:0xebcb9ec0, sys_thread_t:0x4c48d8, state:R) prio=5
        at sun.awt.motif.MToolkit.run(Native Method)
        at java.lang.Thread.run(Thread.java, Compiled Code)
    "SunToolkit.PostEventQueue-0" (TID:0xebcba1d0, sys_thread_t:0x4a24b8, state:
CW) prio=5
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java, Compiled Code)
        at sun.awt.PostEventQueue.run(SunToolkit.java, Compiled Code)
    "AWT-EventQueue-0" (TID:0xebcba1a8, sys_thread_t:0x4a2380, state:CW) prio=6
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java, Compiled Code)
        at java.awt.EventQueue.getNextEvent(EventQueue.java, Compiled Code)
        at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java, C
ompiled Code)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java, Com
piled Code)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java, Compiled C
ode)
    "Finalizer" (TID:0xebc98320, sys_thread_t:0x699f8, state:CW) prio=8
        at java.lang.Object.wait(Native Method)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java, Compiled Cod
e)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java, Compiled Cod
e)
        at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:174)
    "Reference Handler" (TID:0xebc983b0, sys_thread_t:0x5e980, state:CW) prio=10
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java, Compiled Code)
        at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:114)
    "Signal dispatcher" (TID:0xebc983e0, sys_thread_t:0x5e778, state:CW) prio=5
    "Thread-1" (TID:0xebbf28c8, sys_thread_t:0x26bb0, state:CW) prio=5
Monitor Cache Dump:
    sun.awt.ScreenUpdater@EBCCB168/EBE1FCD8: <unowned>
        Waiting to be notified:
            "Screen Updater" (0x683550)
    java.lang.Class@EBCA6950/EBD185F0: owner "AWT-Motif" (0x4c48d8) 1 entry
    java.lang.ref.ReferenceQueue$Lock@EBC98338/EBCCDD50: <unowned>
        Waiting to be notified:
            "Finalizer" (0x699f8)
    java.awt.EventQueue@EBCBA110/EBD60DD0: <unowned>
        Waiting to be notified:
            "AWT-EventQueue-0" (0x4a2380)
    sun.awt.PostEventQueue@EBCBA1D0/EBDA9730: <unowned>
        Waiting to be notified:
            "SunToolkit.PostEventQueue-0" (0x4a24b8)
    javax.swing.TimerQueue@EBBEBEF8/EC387688: <unowned>
        Waiting to be notified:
            "TimerQueue" (0xac8228)
    java.lang.ref.Reference$Lock@EBC983C0/EBCCD890: <unowned>
        Waiting to be notified:
            "Reference Handler" (0x5e980)
Registered Monitor Dump:
    PCMap lock: <unowned>
    utf8 hash table: <unowned>
    JNI pinning lock: <unowned>
    JNI global reference lock: <unowned>
    BinClass lock: <unowned>
    Class linking lock: <unowned>
    System class loader lock: <unowned>
    Code rewrite lock: <unowned>
    Heap lock: <unowned>
    Monitor cache lock: owner "AWT-Motif" (0x4c48d8) 1 entry
    Dynamic loading lock: <unowned>
    Monitor IO lock: <unowned>
    User signal monitor: <unowned>
        Waiting to be notified:
            "Signal dispatcher" (0x5e778)
    Child death monitor: <unowned>
    I/O monitor: <unowned>
    Alarm monitor: <unowned>
        Waiting to be notified:
            <unknown thread> (0x2bea0)
    Thread queue lock: owner "AWT-Motif" (0x4c48d8) 1 entry
        Waiting to be notified:
            "Thread-1" (0x26bb0)
    Monitor registry: owner "AWT-Motif" (0x4c48d8) 1 entry

SIGABRT 6* abort (generated by abort(3) routine)
    si_signo [6]: SIGABRT 6* abort (generated by abort(3) routine)
    si_errno [0]: Error 0
    si_code [0]: SI_USER [pid: 27264, uid: 81727]
        stackpointer=eaab17c8

Full thread dump Classic VM (JDK-1.2.1-K, green threads):
    "BezierScroller Demo" (TID:0xebc318d0, sys_thread_t:0xad94e8, state:CW) prio
=1
        at java.lang.Thread.sleep(Native Method)
        at DemoSurface.run(DemoSurface.java, Compiled Code)
        at java.lang.Thread.run(Thread.java, Compiled Code)
    "Balls Demo" (TID:0xebc2dbc8, sys_thread_t:0xad61a0, state:R) prio=1
        at javax.swing.RepaintManager.addDirtyRegion(RepaintManager.java, Compil
ed Code)
        at javax.swing.JComponent.repaint(JComponent.java, Compiled Code)
        at java.awt.Component.repaint(Component.java, Compiled Code)
        at DemoSurface.run(DemoSurface.java, Compiled Code)
        at java.lang.Thread.run(Thread.java, Compiled Code)
    "PerformanceMonitor" (TID:0xebc950f8, sys_thread_t:0xad2e58, state:CW) prio=
1
        at java.lang.Thread.sleep(Native Method)
        at PerformanceMonitor$Surface.run(PerformanceMonitor.java, Compiled Code
)
        at java.lang.Thread.run(Thread.java, Compiled Code)
    "MemoryMonitor" (TID:0xebc90df0, sys_thread_t:0xace7e8, state:CW) prio=1
        at java.lang.Thread.sleep(Native Method)
        at MemoryMonitor$Surface.run(MemoryMonitor.java, Compiled Code)
        at java.lang.Thread.run(Thread.java, Compiled Code)
    "TimerQueue" (TID:0xebbebf20, sys_thread_t:0xac8228, state:CW) prio=6
        at java.lang.Object.wait(Native Method)
        at javax.swing.TimerQueue.run(TimerQueue.java, Compiled Code)
        at java.lang.Thread.run(Thread.java, Compiled Code)
    "Screen Updater" (TID:0xebccb168, sys_thread_t:0x683550, state:CW) prio=4
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java, Compiled Code)
        at sun.awt.ScreenUpdater.nextEntry(ScreenUpdater.java, Compiled Code)
        at sun.awt.ScreenUpdater.run(ScreenUpdater.java, Compiled Code)
    "AWT-Motif" (TID:0xebcb9ec0, sys_thread_t:0x4c48d8, state:R) prio=5
        at sun.awt.motif.MToolkit.run(Native Method)
        at java.lang.Thread.run(Thread.java, Compiled Code)
    "SunToolkit.PostEventQueue-0" (TID:0xebcba1d0, sys_thread_t:0x4a24b8, state:
CW) prio=5
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java, Compiled Code)
        at sun.awt.PostEventQueue.run(SunToolkit.java, Compiled Code)
    "AWT-EventQueue-0" (TID:0xebcba1a8, sys_thread_t:0x4a2380, state:CW) prio=6
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java, Compiled Code)
        at java.awt.EventQueue.getNextEvent(EventQueue.java, Compiled Code)
        at java.awt.EventDispatchThread.pumpOneEvent(EventDispatchThread.java, C
ompiled Code)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java, Com
piled Code)
        at java.awt.EventDispatchThread.run(EventDispatchThread.java, Compiled C
ode)
    "Finalizer" (TID:0xebc98320, sys_thread_t:0x699f8, state:CW) prio=8
        at java.lang.Object.wait(Native Method)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java, Compiled Cod
e)
        at java.lang.ref.ReferenceQueue.remove(ReferenceQueue.java, Compiled Cod
e)
        at java.lang.ref.Finalizer$FinalizerThread.run(Finalizer.java:174)
    "Reference Handler" (TID:0xebc983b0, sys_thread_t:0x5e980, state:CW) prio=10
        at java.lang.Object.wait(Native Method)
        at java.lang.Object.wait(Object.java, Compiled Code)
        at java.lang.ref.Reference$ReferenceHandler.run(Reference.java:114)
    "Signal dispatcher" (TID:0xebc983e0, sys_thread_t:0x5e778, state:CW) prio=5
    "Thread-1" (TID:0xebbf28c8, sys_thread_t:0x26bb0, state:CW) prio=5
Monitor Cache Dump:
    sun.awt.ScreenUpdater@EBCCB168/EBE1FCD8: <unowned>
        Waiting to be notified:
            "Screen Updater" (0x683550)
    java.lang.Class@EBCA6950/EBD185F0: owner "AWT-Motif" (0x4c48d8) 1 entry
    java.lang.ref.ReferenceQueue$Lock@EBC98338/EBCCDD50: <unowned>
        Waiting to be notified:
            "Finalizer" (0x699f8)
    java.awt.EventQueue@EBCBA110/EBD60DD0: <unowned>
        Waiting to be notified:
            "AWT-EventQueue-0" (0x4a2380)
    sun.awt.PostEventQueue@EBCBA1D0/EBDA9730: <unowned>
        Waiting to be notified:
            "SunToolkit.PostEventQueue-0" (0x4a24b8)
    javax.swing.TimerQueue@EBBEBEF8/EC387688: <unowned>
        Waiting to be notified:
            "TimerQueue" (0xac8228)
    java.lang.ref.Reference$Lock@EBC983C0/EBCCD890: <unowned>
        Waiting to be notified:
            "Reference Handler" (0x5e980)
Registered Monitor Dump:
    PCMap lock: <unowned>
    utf8 hash table: <unowned>
    JNI pinning lock: <unowned>
    JNI global reference lock: <unowned>
    BinClass lock: <unowned>
    Class linking lock: <unowned>
    System class loader lock: <unowned>
    Code rewrite lock: <unowned>
    Heap lock: <unowned>
    Monitor cache lock: owner "AWT-Motif" (0x4c48d8) 1 entry
    Dynamic loading lock: <unowned>