So I just set up a menu under Appearance > Menus, using the Atahualpa 3.5.2 theme, and I'm pleased to say it is working well (the menu was broken for a while).
The only thing I miss is that now all levels of the menu are active, and I liked it before when the theme managed the menu and allowed me to make the top levels of the menu inactive. With WP3, the theme has given control of the menu to WP3, in order to be able to integrate the new menu feature in WP3.
So I'm wondering how I can make the top levels of the menu inactive.
For example, I have:
The "Upcoming" is a page, but it is empty. There is really no content for it, it is just an empty page acting as a parent for the children.
Before with WP2 no could click on it. Now people can, and all they get is an empty page.