iphone.betfair on android, no longer remembers password.

I have been using iphone. betfair on sony ericsson xperia x10 & until recently it would remember username & password, it no longer does this & I have to enter them every time i log in.The site appears slightly different from a few weeks ago,have betfair 'upgraded' it? I would be grateful for any help. p.s. have tried android app, its the same.