[theandrewbailey]

Designers tend to love buttons with rounded corners, but users don't care if buttons (or text input boxes) are rounded or squared, or if the magnifying glass icon in the search box is 5% bigger than the text.

Is there a standard to horizontal separator thickness? Oh, the separator didn't go the extra 20 pixels over to the edge? Whatever, the separator is there and doing its job, and it made its point.