I don't seem to be able to 'sign in with Facebook' on the MN sign-in page when I'm on my ipad -- I click on it, the FB page loads , says 'you have signed in to Mumsnet before - do you want to continue. I click 'continue' and another Mumsnet sign-on page comes up. (but this time without the FB sign-in option)
( FYI I'm posting this on my PC. where I am still signed in, and not from my tablet)
I don't want to have to change my password yet again (I have enough trouble remembering it as it is. Which is why I usually sign in with FB)