On 8/24/05, Bruce Gilbert <[EMAIL PROTECTED]> wrote:
> On this site :http://www.semlogic.com/
> 
> there is some unwanted spacing on the right margin where my h2 is for
> testimonials is. (between the header and top gray bar). I am not sure
> where this is coming from. Can someone take a look and give me some
> possible suggestions?

Hi, Bruce,

This is vertical margin collapsing, rearing its confusing head. :-)

Basically, vertical margins collapse/merge between/around elements
whenever there is no padding or border between them. In this case, the
culprit is the .5em top margin on #centre. If you replace this top
margin with top padding, you'll get the effect you were looking for.

Why this happens is pretty complex. It's been discussed a few times
before on the list; check the following links for further discussion
on collapsing margins:

Me on collapsing margins:
http://archivist.incutio.com/viewlist/css-discuss/51839

The specification:
http://www.w3.org/TR/REC-CSS2/box.html#collapsing-margins

Eric Meyer on why collapsing margins exist:
http://archivist.incutio.com/viewlist/css-discuss/33569

HTH,

Michael
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