I wish I could pinpoint the problem more specifically, but I am at my wit's end... I am using a clean WP install running theme Twenty Eleven. When I activate Events Manager it creates a parent page Events with child pages Categories, Locations, My Bookings. All good -- everything works. But as soon as I change and save ANY EM setting, the links to these top level pages are broken. Or if I delete a WP page, everything breaks. The EM events page hijacks my "page for posts" etc. I am going in circles! I did "reset" and have tried everything over and over, including looking in the database for clues. Help?!