Thanks for fixing the white screen issue. I noticed that the problem of adding new menu items is still broken. I noticed this on version 1.5 and it still seems to present on 1.5.1.
- Under Appearance > Menus
- Try to add a new menu item to an existing menu
- In the menu area, see an error of "Please try again" with a link to [siteurl]/wp-admin/nav-menus.php?action=delete&menu=34&_wpnonce=b14b4e50d2
Disabling the plugin returns the menu function.