The scrollbar ranges on Windows seem to be off. Given the following
range values: minimum = 0, maximum = 20, visible = 10... On Motif, the
scrollbar value ranges from the minimum to maximum-visible, as documented in
the Scrollbar.setValues() documentation. So, for the above values, the
scrollbar value can be scrolled from 0 to 10. On Windows, with the same
range, the scrollbar can only be scrolled from 0 to 1.

Sample Code:

import java.applet.Applet;
import java.awt.BorderLayout;
import java.awt.Scrollbar;
import java.awt.event.AdjustmentEvent;
import java.awt.event.AdjustmentListener;

public class scrollBarBug extends Applet implements AdjustmentListener
{
  public void init()
  {
    Scrollbar scrollbar = new Scrollbar(Scrollbar.VERTICAL,
      0, 10, 0, 20);

    // Just setting layout so scrollbar thumb will be big enough to use
    setLayout(new BorderLayout());
    add("East", scrollbar);

    scrollbar.addAdjustmentListener(this);
  }

  public void adjustmentValueChanged(AdjustmentEvent e)
  {
    System.out.println(e.paramString());
  }
}