As far as I can see it all works OK on the browser version.
If you are having a problem staying logged in then benc's magic link may help: http://www.rib.net/expire_cookies.php
If you are having a problem on the ipad/ios/android apps then (I don't have it handy to test) - I suggest you kill the app and reopen it. That will solve 99% of issues. In iOS:
When not in the app hold down the 'home' key. All your running apps will appear. Click minus sign beside ribnet. [this might have changed in iOS7 to be more like Android?]
In android (v4+):
When not in the app, hit the key/icon that looks like two rectangles and find ribnet and swipe it to side of screen...