Significant patch by Moshe Weitzman. Please backup your database before upgrading ... Improve DB integrity. Factor the is_public column out of og_ancestry table and into a new og_access_post table that is 'owned' by og_access module. Add primary key to og_ancestry to prevent duplicate entries. Requires a visit to update.php. Customized Views which relied on the is_public column will need to be fixed in the Views UI. Views that ship with OG are unaffected.