Fix WebKit Checkbox Overflow

I want to share a quick tip about working with checkboxes in Chrome and Safari, the WebKit-based browsers. I was recently working with a series of checkboxes when I noticed that Safari and Chrome were doing some funky "cut off" with them:

What's even weirder is that they were randomly fix and unfix themselves as you hover over them. Horrible! After a bit of tinkering, I discovered the solution was adding a line-height of 20px to the parent the checkbox:

.checkboxList li { /* ..or whatever the parent is */
	line-height: 20px;
}

Twenty pixels should be considered the minimum -- anything smaller wont prevent the problem completely.