Mobile safari won't login to websites on iPad My wife's iPad 1 will no longer log into website accounts e.g. Amazon when using mobile safari, it just refreshes back to the log in page. She can get into these sites through the google app though and I can get into her accounts on mobile safari my iPad 2.

It sounds like some sort of safari file corruption so all I can think of, and have tried without success, is to do a complete restore from iTunes. 

Anyone have any ideas ?
Have you tried clearing the safari cache and cookies from the settings app -> safari section?