I'm trying to troubleshoot an issue on a client's site. There is one specific page which appears as "not found" unless you log in and then visit the front end, in which case it appears normally. The visibility on the page is set to public, and in every other way it's a normal boring wordpress page. Stranger still, it only started happening recently (after months of trouble-free use).
Problem page: http://www.leecamp.net/schedule/
Any ideas why this would happen?