Maybe I switched to Advanced Permissions too late, I don't know. The fact is that half of the content I added is visible to Guests but not to Registered Users (although in Permissions nothing is ticked for both groups). This applies to such basic thing as navigation, which I added in the Page Types page in Dashboard. Now every page I add has this strange visibility problem. Now I need to straighten this on every page. Is there any easy way to do that? I'd really like to avoid loads of clicking on every subpage.