I've noticed in the edit-profile form on UX Stack Exchange a weird prompt with an important message - the date format.
Personally I would consider it terribly wrong (force to memorize data format, which might be hard!), but since it's a part of such a great service, it made me think... is there any reason behind it?
So - do you think there's any reason behind this particular tip inside the form field? Or is it just an usability error?