I encountered the same results as you. What I did was edit the .js script that menu maker published. It is a bit weird, but works for me. I search for any occurrence of say "top". It will be something like "your_button_top". I delete the text between the quotes and it works fine. Do the same thing for "bottom".
Hope this helps.
Now if I could find a solution to the DW cs3 extension that Menu Maker says will work, I'd be happy. http://www.talkgraphics.com/images/smilies/confused.gif
Note that my email is incorrect, it ends with .com NOT .co