I am working on a Custom CSS solution for the threshold using the Smart Menus of the latest version of Xterme 1.1.1 and the Plus version (not sure what the release is yet).
If you need the threshold, when you have the latest version of Xtreme and plus version installed, test Smart menus, and if they are OK for you, post back with a link to the site and specifics about what menu and what threshold change you are looking for, and I will give you some Custom CSS to test.