The only way I can login on my iPad is to click on "reply" to a thread and the login box comes up. If I try to log in the normal way, for a few seconds I can see the username and password boxes at the top of the page when I go into the forum section and then they are covered by an advert. Could either the advert be moved or the login boxes? My iPad is the original one, maybe this doesn't happen on later models and it doesn't happen on my computer.