I have a frame, which is set to borderLayout. I have some components on the frame set according to the borderlayout constraints. When i resize the frame , the scrollbar border can be seen on the textarea , it can be even see on the textarea scrollbar also.
Step to reproduce:
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1) Run the below program.
2) move the mouse to the left bottom of the frame & resize the frame towards the right side of the frame. Observe that scrollbar border can be seen on the textarea.
If see the same, then the bug is reproduced.
I tested this from 1.4.2 to jdk b07 , it is reproducable. This happens on solaris.

import java.awt.*;
class DragMouseEvent extends Frame {
    TextArea textarea = new TextArea("TextArea");
    Label label = new Label("Label");
    Panel panel = new Panel();
    List list = new List();
    Choice choice = new Choice();
    Button button = new Button("Button");
    TextField tf = new TextField("TextField");
    Checkbox checkbox = new Checkbox("CheckBox");
    Scrollbar sb = new Scrollbar();
    Panel centerPanel = new Panel();

    DragMouseEvent() {

        add(centerPanel, BorderLayout.CENTER);
        centerPanel.setLayout(new FlowLayout());

        add(panel, BorderLayout.NORTH);
        panel.setLayout(new FlowLayout());

        choice.add("choice item 1");
        choice.add("choice item 2");
        choice.add("choice item 3");
        panel.add(choice);
        panel.add(label);
        panel.add(button);
        panel.add(checkbox);
        add(textarea, BorderLayout.EAST);
        list.add("list item 1");
       list.add("list item 2");
        add(list, BorderLayout.SOUTH);
        add(sb, BorderLayout.WEST);
        sb.setBackground(java.awt.Color.red);
        setSize(500, 400);
        setLocation(200, 200);
        setVisible(true);
    }

    public static void main(String[] args) {
        new DragMouseEvent();
    }
}