Should HTML “buttons” have the same box-model as everything else?

Question

Referring to both the button element and the input element with a type of button, I ran across a behavior I think is a bug (i

Answer 1

Apparently this bug has already been reported to Chrome and Firefox. The loophole is that in both cases these elements have an initial value of box-sizing: padding-box set in their browser stylesheets. So it's not technically a default value (initial != default). However, the only way to revert these elements back to box-sizing: content-box is using proprietary browser extensions for content-box, so there is not any truly CSS compliant way to do this. box-sizing doesn't exist for CSS 2.1, and proprietary browser extensions are not valid CSS 3.