Problem with DropDownMenuDisplayer

Matt,

I try to use the simple drop down menu. It works fine with frames too.

But there is one problem: the 'null' behind every unexpanded or leave 
menu item. (This is visible on your exemples too!)

The generated code looks like this:

<table width="150px" cellpadding=1 cellspacing=1>
    <tr align=left>
        <td nowrap class=normal>
            <b><label 
style="cursor:hand;font-family:verdana;font-size:10px" 
onMouseOver="this.style.color='red'" 
onMouseOut="this.style.color='black'" 
onClick="toggleMenuDisplay(document.getElementById('WNT'), 
document.getElementById('WNT_img'))"> <img id="WNT_img" 
src="../Images/Rarrow.gif" style="border-style:none"/>&nbsp;Windows NT 
</label>
            *<div id="WNT" style="display:none">*
                <table cellpadding=0 cellspacing=0>
                    <tr>
                        <td>
                            <b>&nbsp;&nbsp;<a href="null" target="_self" 
title="Test Menu 1.1" 
style="text-decoration:none;font-family:Helvetica,Arial;font-size:10px">&nbsp;&nbsp;Test 
Menu 1.1</a>
                        </td>
                    </tr>
                </table>
            *</div>null           <-------- where does this come from?????*
        </td>
    </tr>
</table>

I did some research in the sources and found the following:
In net.sf.navigator.displayer is a file called 
DisplayerStrings.properties. There you can find the following two lines:

dd.menu.item.bottom=</table></div>
dd.menu.item.row.start=<tr><td><b>&nbsp;&nbsp;

In the source code I saw, that you read this property in 
net.sf.navigator.displayer.DropDownDisplayer.java. It is the last 
statement of the method displayComponents(..) [line 149]

The method displayComponents() is called in several of your displayers. 
I just looked at the DropDownMenuDisplayer and found to places where it 
is called:

            if (components[i].getMenuComponents().length > 0) {
                if (this.isAllowed(components[i])) {
                    sb.append(displayStrings.getMessage("dd.menu.expander",
                            components[i].getName(),
                            components[i].getName() + "_img",
                            displayStrings.getMessage("dd.image.expander",
                                components[i].getName() + "_img",
                                
displayStrings.getMessage("dd.image.src.expand")) +
                            NBSP + img + title));
                    *displayComponents(components[i], sb);*
*                    sb.append(displayStrings.getMessage("dd.menu.restore",
                            components[i].getName(),
                            components[i].getName() + "_img"));
*                } else {
                    
sb.append(displayStrings.getMessage("dd.menu.restricted",
                            components[i].getName(),
                            components[i].getName() + "_img",
                            displayStrings.getMessage("dd.image.expander",
                                components[i].getName() + "_img",
                                
displayStrings.getMessage("dd.image.src.expand")) +
                            NBSP + img + title));
                }

The red marked code might be a problem if the key dd.menu.restore is not 
found. The struts documentation does not say what is returned, if a 
message is not found.

Could you please have a look at this and see, if this is the real 
problem? Maybe the problem is solved if I simply define the property 
dd.menu.restore but I have no idea what the value of this property 
should be.

Many thanks for your help.

Tom