[rorylaitila]

Yeah, it's escaping me at the moment all of the reasons, but calling .submit() on a form element doesn't exactly have all of the behaviors as calling .click() on a button element in a form, particularly multiple buttons in a form.

[hapidjus]

Are you perhaps using the button name/value for something? Havent tested but i suspect that submit() does not pass that right?

[rorylaitila]

Yep that's one reason. I make heavy use of that.