I just found I have the same issue now too...
however I had always had to click login no matter what I did...
but now the login page no longer allows storing of my login credentials...
in IE, but luckily Chrome is still keeping the login cookie...
PLEASE FIX THIS ASAP... I HATE USING CHROME!!!
EDIT
OK ignore the above I didn't realise it spawned into in-private window while testing a new update to a website I'm working on

BF3 does that to me too... its annoying lol...
however it still always asks me to sign in alll the time... even in chrome often...
however there is an issue with all the icons on the site they have gone all wonkey...
EDIT
My guess is Paul is working on the site right now... he is a night bird like some of us
EDIT
Indi, you naughty boy >.<
EDIT
funny it displays and works under CHROME... looks like cross browser control is broken...