According to the list of fixes with 10.5.5, the following is addressed: iCal: Resolves an issue with syncing published calendars. This item, however, isn't any more specific, and doesn't reference the iPhone at all. But, its a known issue that iPhone over-the-air calendar syncing via MobileMe does not include any subscribed calendars - only local ones. Does anyone know if this fix listed above addresses the MobileMe to iPhone subscribed calendar sync??