I've used this module before and haven't had a problem. But installed it on a site, pointed it at the Primary Links menu and instead of the actual menu items it just shows the menu tree expanded but each menu item says Array instead of the menu item name and link to the node. See screenshot.

CommentFileSizeAuthor
Screen Shot 2011-09-30 at 10.24.20 AM.JPG27.08 KBBMorse