I don't know you, but I am not into rounded inputs...for important information. Is like they miss some formality or something, too playful. They also give me this perception of feeling out of place. Despite rounded buttons are more clickable if rounded. Does it happend to you?

I'm more disturbed by other things in this form to mind the roundness; buttons being separated with a text line like that just look off - I'd rather leave it out completely, or make the "create an account" a part of the text line.