For a few days now I've been seeing this behaviour. My first login attempt always fails, and the message 'Settng cookie...' briefly appears (it's simple text at the top-left of the page which is otherwise blank). Then the web page refreshes itslelf and if I attempt to log in again I succeed.
I've seen the same behaviour with both Chrome and Internet Explorer.
Has anyone else been seeing this?
I'm hoping it's some kind of a bug, but a little concerned that it might be some kind of malware attempting to hijack my password.