Should we really have this   in the simplemenu-block?

It's not obvious to make a custom style, otherwise.

--- a/simplemenu.module
+++ b/simplemenu.module
@@ -350,7 +350,7 @@ function simplemenu_get_menu() {
         . ' id="simplemenu"' . substr($menu, $pos);
 
   variable_set('simplemenu_running', FALSE);
-  return '<div class="simplemenu-block">' . $menu . '&nbsp;</div>';
+  return '<div class="simplemenu-block">' . $menu . '</div>';
 }
 
 /**