Some people have recently reported that their PhotoShows are not playing back. We have identified the cause of this and sincerely apologize for the inconvenience. This would also cause a problem where you could not finish creating a show after you uploaded your photos. The problem is expected to be fixed by tonight or tomorrow, and any PhotoShows that were not playing back will work just fine.
Recently we have been building up our infrastructure (adding servers, merging server locations) in order to improve performance and support more services. As a result of these changes, some of the pages ended up pointing to the wrong place. It will be fixed shortly.