Little Stupid CSS Insight Of The Day

Today, after fighting several minutes to understand why my form was not being send and then checking it with Firebug and seeing it completely broken (as in “the form had no inputs ’cause it was being closed right after being opened). I checked and rechecked my HTML for errors and nothing. Then I understood why.

This is a <div>. It works like a box (also, you’ll hear a lot about “boxing model” and such).
This is a <form>.
This is a table.

So, if you keep that mind: You can box your desk; you can put a box inside your desk drawers but you can’t cover your desk drawers with your box while putting both inside your desk. It doesn’t work like that.