I have two very similar VF components with actionFunctions in them. Thee components are conditionally rendered using a formula to see if the user is logged in and are not shown if the user is a guest. When I use an actionFunction in one of the components it works fine. When I add it to the other component and try to view the page as a guest I get the 'down for maintenance page'. From the debug log it looks like it's triggering the Unauthorized page, but it's unclear why.
I realize this is kind of vague, but I'm wondering if there are there some permissions issues here with actionFunctions that I'm not seeing.