Version of Java:
java version "1.3.0"
Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.0-b24)
Java HotSpot(TM) Client VM (build 1.3.0-b24, mixed mode)

System information:
SunOS monoceros 5.6 Generic_105182-20 i86pc i386 i86pc

Processor information:
Status of processor 0 as of: 07/28/00 17:23:35
  Processor has been on-line since 07/28/00 17:05:56.
  The i386 processor operates at 743 MHz,
        and has an i387 compatible floating point processor.
Status of processor 1 as of: 07/28/00 17:23:35
  Processor has been on-line since 07/28/00 17:05:56.
  The i386 processor operates at 743 MHz,
        and has an i387 compatible floating point processor.

STEPS TO REPRODUCE:
- Install build 24 of Kestrel/Solaris on your host x86 solaris 6 machine from

  /net/hotvm-x.eng/builds/jdk1.3_b24/production-1.3-b24/pkgarchive/i386/b24

- To start control panel go to the latest jdk (b24) directory,
  type 'jre/bin/ControlPanel'

RESULTS:

The control panel throws the following exception on x86 sol6 for build 24:

Problem with constructor javax.swing.plaf.FontUIResource and args {Dialog,0,12} : and types {class java.lang.String,int,int} : java.lang
.reflect.InvocationTargetException
java.lang.Exception: Stack trace
        at java.lang.Thread.dumpStack(Thread.java:993)
        at javax.swing.UIDefaults$ProxyLazyValue.createValue(UIDefaults.java:663)
        at javax.swing.UIDefaults.get(UIDefaults.java:145)
        at javax.swing.MultiUIDefaults.get(MultiUIDefaults.java:46)
        at javax.swing.UIDefaults.getFont(UIDefaults.java:223)
        at javax.swing.UIManager.getFont(UIManager.java:456)
        at javax.swing.LookAndFeel.installColorsAndFont(LookAndFeel.java:90)
        at javax.swing.plaf.basic.BasicPanelUI.installDefaults(BasicPanelUI.java:51)
        at javax.swing.plaf.basic.BasicPanelUI.installUI(BasicPanelUI.java:42)
        at javax.swing.JComponent.setUI(JComponent.java:325)
        at javax.swing.JPanel.updateUI(JPanel.java:107)
        at javax.swing.JPanel.<init>(JPanel.java:67)
        at javax.swing.JPanel.<init>(JPanel.java:97)
        at javax.swing.JRootPane.createGlassPane(JRootPane.java:291)
        at javax.swing.JRootPane.<init>(JRootPane.java:198)
        at javax.swing.JApplet.createRootPane(JApplet.java:117)
        at javax.swing.JApplet.<init>(JApplet.java:110)
        at sun.plugin.panel.ControlPanel.<init>(ControlPanel.java:43)
        at sun.plugin.panel.ControlPanel.main(ControlPanel.java:124)
Problem creating javax.swing.plaf.metal.MetalLookAndFeel with method getControlTextFont and args { : java.lang.reflect.InvocationTargetEx
ception
java.lang.Exception: Stack trace
        at java.lang.Thread.dumpStack(Thread.java:993)
        at javax.swing.UIDefaults$ProxyLazyValue.createValue(UIDefaults.java:670)
        at javax.swing.UIDefaults.get(UIDefaults.java:145)
        at javax.swing.MultiUIDefaults.get(MultiUIDefaults.java:46)
        at javax.swing.UIDefaults.getFont(UIDefaults.java:223)
        at javax.swing.UIManager.getFont(UIManager.java:456)
        at javax.swing.LookAndFeel.installColorsAndFont(LookAndFeel.java:90)
        at javax.swing.plaf.basic.BasicTabbedPaneUI.installDefaults(BasicTabbedPaneUI.java:151)
        at javax.swing.plaf.metal.MetalTabbedPaneUI.installDefaults(MetalTabbedPaneUI.java:51)
        at javax.swing.plaf.basic.BasicTabbedPaneUI.installUI(BasicTabbedPaneUI.java:132)
        at javax.swing.JComponent.setUI(JComponent.java:325)
        at javax.swing.JTabbedPane.setUI(JTabbedPane.java:145)
        at javax.swing.JTabbedPane.updateUI(JTabbedPane.java:156)
        at javax.swing.JTabbedPane.<init>(JTabbedPane.java:123)
        at javax.swing.JTabbedPane.<init>(JTabbedPane.java:110)
        at sun.plugin.panel.ActivatorPanel.<init>(ActivatorPanel.java:56)
        at sun.plugin.panel.ControlPanel.init(ControlPanel.java:51)
        at sun.plugin.panel.ControlPanel.main(ControlPanel.java:125)

The control panel in build 22 is loading. Also this problem was not observed on x86 solaris 7 and x86 solaris 8 and neither on the sparc platforms.