When running 1.3.1_29b01 SwingApplet Demo using appletviewer the following exception is thrown. This does not occur in 1.3.1_28b04.

java.lang.SecurityException: null AccessControlContext
        at javax.swing.UIDefaults$ProxyLazyValue.createValue(UIDefaults.java:656
)
        at javax.swing.UIDefaults.get(UIDefaults.java:146)
        at javax.swing.MultiUIDefaults.get(MultiUIDefaults.java:41)
        at javax.swing.UIDefaults.getBorder(UIDefaults.java:265)
        at javax.swing.UIManager.getBorder(UIManager.java:481)
        at javax.swing.LookAndFeel.installBorder(LookAndFeel.java:102)
        at javax.swing.plaf.basic.BasicButtonUI.installDefaults(BasicButtonUI.ja
va:123)
        at com.sun.java.swing.plaf.windows.WindowsButtonUI.installDefaults(Windo
wsButtonUI.java:60)
        at javax.swing.plaf.basic.BasicButtonUI.installUI(BasicButtonUI.java:58)

        at javax.swing.JComponent.setUI(JComponent.java:317)
        at javax.swing.AbstractButton.setUI(AbstractButton.java:1305)
        at javax.swing.JButton.updateUI(JButton.java:113)
        at javax.swing.AbstractButton.init(AbstractButton.java:1600)
        at javax.swing.JButton.<init>(JButton.java:103)
        at javax.swing.JButton.<init>(JButton.java:78)
        at SwingApplet.init(SwingApplet.java:35)
        at sun.applet.AppletPanel.run(AppletPanel.java:341)
        at java.lang.Thread.run(Thread.java:527)