Can't login from mobile Safari.

Tried to log in from mobile Safari (iOS 5.01) and it would just return me to login screen.

I'm able to reproduce the problem as well. I think it may be a bug in mobile Safari, but I'll look into it. It appears create a new session on every page view.

Ah... So, apparently iOS 5.0.1 turns off cookies for mobile Safari. You need to open the "Settings" app, select "Safari". In the "Privacy" section, there is a setting called "Accept Cookies". It is probably set to 'Never'. If you change it to "From visited", you should be able to log in again.

Works like a charm after changing the cookie setting. Thanks.