Google "collapsing margins".
Google "collapsing margins". It's normal behavior.
But i dont have 2 margins next to each other???? the only margin set is for the property, with margin-bottom: 10px; do you not need to specify two margins to collapse into each other?
But you do! A margin of 0
But you do!
A margin of 0 is a margin. You have several containers with margin-bottom of 0. The margin-bottom of the last .property is collapsing with the margin-bottom of its two parent containers, .center (bad name!) and #content and the margin-top of the following element #footer. The margin is then applied between the adjacent margin-bottom (#center) and margin-top (#footer).
Get the firebug plugin for firefox. Use the HTML inspector view. However over elements and it will show you the element's space, padding and margins.
I see the light, thank you very much.