Android.

When you click "unread" it goes to the page before the last page, or something. I'm not sure. Definitely doesn't go to unread.

Also, not having a "User CP" makes the whole thing almost useless. I can't view my subscriptions, but yet it assumes that if I log in then I've read everything I'm subscribed too. The subscription system is broken, but it's also broken on the website version, so I suppose that's not a bug... definitely annoying though.