I have this weird problem with my page menus. When I load the start page from the structure tree all links in the page menus gets appended with for example ?id=138_912&PreviewURL=True If I click that link the page loads but directly on load i get an error message that the page couldn't be loaded. The problem only appears in edit mode. FriendlyUrlRegistration is activated. i use pagedata.LinkURL for all the problematic links. Any ideas about this problem?