Gridbaglayout - mysterious spaces

[Didje]

Hi,
I'm trying to design a kind of calculator GUI using gridbaglayout.
At the top of the calculator will be a couple of menus and then will come the section with all the buttons etc.
Initially, I have designed the menu titles purely as labels (since I haven't figured out how to create actual menus - any help there would be great!) but the final menu item is separated by a mysterious space from the other ones.
Here is the code I've got so far - the "About" label is appearing far to the right of the other labels.

LayoutExample window = new LayoutExample() ;
window.setTitle ("Layout Example Application");
window.pack();
window.setVisib le(true);

public LayoutExample()
{
//setLayout(new GridLayout(1,2) );

p2 = new Panel();
p2.setBackgroun d(Color.gray);
add(p2);
gridBag();
}

public void gridBag()
{
// Set up GridBagConstrai nts and layout and apply it to the panel
GridBagConstrai nts c = new GridBagConstrai nts();
GridBagLayout gridbag = new GridBagLayout() ;
p2.setLayout(gr idbag);

// Create the labels and add them to the panel
Label top = new Label("File");
top.setAlignmen t(Label.CENTER) ;
gridbag.setCons traints(top, c);
p2.add(top);

Label top2 = new Label("Edit");
top2.setAlignme nt(Label.CENTER );
gridbag.setCons traints(top2, c);
p2.add(top2);

Label top3 = new Label("View");
top3.setAlignme nt(Label.CENTER );
gridbag.setCons traints(top3, c);
p2.add(top3);

c.gridwidth = GridBagConstrai nts.REMAINDER;
Label top4 = new Label("About");
top4.setAlignme nt(Label.CENTER );
gridbag.setCons traints(top4, c);
p2.add(top4);

// On next line, create the textarea
TextArea comments = new TextArea(3, 50);
comments.setEdi table(true);
comments.setTex t("Comments:" );
gridbag.setCons traints(comment s, c);
p2.add(comments );

}