Run the attached jar file "breakMustang.jar" with 1.6 and you will
get an exception :

Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException:
 -1
        at javax.swing.plaf.basic.BasicTabbedPaneUI$TabbedPaneScrollLayout.layou
tContainer(BasicTabbedPaneUI.java:2823)
        at java.awt.Container.layout(Container.java:1402)
        at java.awt.Container.doLayout(Container.java:1391)
        at java.awt.Container.validateTree(Container.java:1474)
        at java.awt.Container.validateTree(Container.java:1481)
        at java.awt.Container.validateTree(Container.java:1481)
        at java.awt.Container.validateTree(Container.java:1481)
        at java.awt.Container.validateTree(Container.java:1481)
        at java.awt.Container.validateTree(Container.java:1481)
        at java.awt.Container.validate(Container.java:1449)
        at java.awt.Window.pack(Window.java:502)
        at breakmustang.MainFrame.initComponents(MainFrame.java:59)
        at breakmustang.MainFrame.<init>(MainFrame.java:22)
        at breakmustang.MainFrame$1.run(MainFrame.java:73)
        at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:209)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:589)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:247)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:168)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:162)

        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:154)

        at java.awt.EventDispatchThread.run(EventDispatchThread.java:115)
Exception in thread "AWT-EventQueue-0" java.lang.ArrayIndexOutOfBoundsException:
 -1
        at javax.swing.plaf.basic.BasicTabbedPaneUI$TabbedPaneScrollLayout.layou
tContainer(BasicTabbedPaneUI.java:2823)
        at java.awt.Container.layout(Container.java:1402)
        at java.awt.Container.doLayout(Container.java:1391)
        at java.awt.Container.validateTree(Container.java:1474)
        at java.awt.Container.validateTree(Container.java:1481)
        at java.awt.Container.validateTree(Container.java:1481)
        at java.awt.Container.validateTree(Container.java:1481)
        at java.awt.Container.validateTree(Container.java:1481)
        at java.awt.Container.validateTree(Container.java:1481)
        at java.awt.Container.validate(Container.java:1449)
        at java.awt.Window.dispatchEventImpl(Window.java:1807)
        at java.awt.Component.dispatchEvent(Component.java:4049)
        at java.awt.EventQueue.dispatchEvent(EventQueue.java:591)
        at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchTh
read.java:247)
        at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThre
ad.java:168)
        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:162)

        at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:154)

        at java.awt.EventDispatchThread.run(EventDispatchThread.java:115)


This does not happen with Tiger. This was submitted by a Peabody user who
tried the mustang build 34. It seems to be new in this build, although this
is not certain. Here is the discussion on the Mustang forum
about this bug :

http://forums.java.net/jive/thread.jspa?threadID=691&tstart=0


###@###.### 2005-05-16 18:45:09 GMT

Here the small test to reproduce the problem:

public class MyTest {
  public static void main(String[] args) {
    JFrame frame = new JFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    JTabbedPane pane = new JTabbedPane();
    pane.setTabLayoutPolicy(JTabbedPane.SCROLL_TAB_LAYOUT);
    frame.add(pane);
    frame.pack();
    frame.setVisible(true);
  }
}

###@###.### 2005-05-17 15:14:50 GMT