If there is a URL on the form and the user types in:
http:/www.mysite.com (watch the single forward slash)
the value passes the field check (no red border) but NOT the data validation on the Save().
Then user is clueless: something is wrong, but no visual indicator.
BTW: Everybody so far has HUGE problems with the mandatory http:// or https:// in front of a URL. They never have to do that anywhere, on any form, just www.mysite.com or facebook.com/mysite suffices everywhere, but not here.
Can you do something about that, e.g. take the mandatory part away, change check if it is omited, it is inserted automatically?
Really, everybody made an errror here during Alfa-testing.