This is reproducible on all platforms with jdk7 b26 awt pit build. Not reproducible with 6u10 b23.

Run the below test. It throws a NPE.
Exception in thread "main" java.lang.NullPointerException
        at javax.swing.ScrollPaneLayout.preferredLayoutSize(ScrollPaneLayout.java:494)
        at java.awt.Container.preferredSize(Container.java:1661)
        at java.awt.Container.getPreferredSize(Container.java:1646)
        at javax.swing.JComponent.getPreferredSize(JComponent.java:1645)
        at TestSP.main(TestSP.java:6)


import javax.swing.*;

public class TestSP {
    public static void main(String[] args) {
        JScrollPane sp = new JScrollPane();
        sp.getPreferredSize();
    }
}