Serializing JSplitPane throws Exception in the Swing Tiger PIT Build Dated 27Jun

Serializing JSplitPane throws Exception in the Swing Tiger PIT build(Dated 27th June)

PIT Java version
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java version "swing-jcg-sparc-01-2003-06-27-int.tiger"
Java(TM) 2 Runtime Environment, Standard Edition (build swing-jcg-sparc-01-2003-06-27-int.tiger)
java HotSpot(TM) Client VM (build 1.5.0-beta-b09, mixed mode)

Exception
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java.io.NotSerializableException: javax.swing.plaf.basic.BasicSplitPaneDivider$DividerLayout
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1054)
        at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
        at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:367)
        at java.awt.Container.writeObject(Container.java:2798)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:809)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1296)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:278)
        at java.beans.PropertyChangeSupport.writeObject(PropertyChangeSupport.java:354)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:809)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1296)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
        at java.io.ObjectOutputStream.defaultWriteFields(ObjectOutputStream.java:1332)
        at java.io.ObjectOutputStream.defaultWriteObject(ObjectOutputStream.java:367)
        at java.awt.Component.writeObject(Component.java:6909)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
        at java.lang.reflect.Method.invoke(Method.java:324)
        at java.io.ObjectStreamClass.invokeWriteObject(ObjectStreamClass.java:809)
        at java.io.ObjectOutputStream.writeSerialData(ObjectOutputStream.java:1296)
        at java.io.ObjectOutputStream.writeOrdinaryObject(ObjectOutputStream.java:1247)
        at java.io.ObjectOutputStream.writeObject0(ObjectOutputStream.java:1052)
        at java.io.ObjectOutputStream.writeObject(ObjectOutputStream.java:278)
        at TestSerialization.main(TestSerialization.java:11)


Setps to reproduce
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1) Compile and run the attached code with PIT build (Dated 27th June)
2) If it throws exception then its a bug.