In addition to the permission fixes, a lot of users have been deleted (either completely inactive users or bots), and we've 'archived' all the previous community threads. They won't appear for a regular member, so if you want access to an old thread or want it revived, you'll have to let us know. Otherwise they'll all stay hidden, and eventually deleted. We wanted a clean start for the future development.
Edit: All users, clear your pinktards.com cookies if you can't login!