Interesting you noticed the padlock open, I wonder how many people wouldn't have?
One of the nice features of Firefox is the address bar changes colour whenever you're on a secure site; instant visual recognition!
For major companies such as the two involved to have a non-secure site, really isn't acceptable and would suggest lack of testing prior to roll-out.
Ask yourself. Would Mr and Mrs Average dream of entering an "s" in the URL? I think not.