CSS nightmare

As most of you know, the behavior of CSS in different browsers/versions of browsers can be a nightmare...

Each browser interpret the standard on his own, and bugs (mainly in IE) add some spice to the pleasure of making all this work the same, no matter what the browser is...
One of the problem I had to solve recently was the positioning of div thanks to CSS...

But fortunately there are great resources out there, so if you have such problem and pull your hair to reach your goal, maybe this tutorial could help you:
Learn CSS positioning in 10 steps