Font Icons in Submit Input in Forms

Font icons like FontAwesome are widely used than the old-school image icons. It can be scaled to any size without losing it's sharpness and you can save a lot of HTTP request at the same time.

But in a few cases font icons can prove to be an obstacle in your web design, here we are talking about adding icon fonts in <input type='submit' value='Submit'>

Why Are There Spaces or Gap Between Elements

Have you ever tried creating something like a grid of boxes with a few inline-block elements? If you ever tried doing it or something similar then there's a chance you have came across a problem and that's mysterious space between the elements.

Normally with spaces/gaps.