the steps to reproduce the problem

1. run the testcase (the source code are below)
just a frame and a button inside the frame
2. resize the frame
3. the size of the button will not be adjusted to the size of the frame

================= source code =====================
import java.awt.*;

public class test{
    public static final void main(String args[]) {
        Frame fr = new Frame();
        fr.setBounds(0,0,200,200);
        Button button = new Button("button");
        button.setBackground(Color.RED);
        fr.add(button);
        fr.setVisible(true);
    }
}
====================================================

platform: ubuntu, metacity window manager
jdk: latest jdk7 build

the problem is reproducible since jdk7 b25