Bill Brown wrote:

> I get the bottom margin on some OS/Browser combos as well, but more
> often, it collapses. I haven't checked the spec yet, but I suspect  
> that
> this behavior is incorrect because it isn't countered by the normal
> collapsing margin fixes (application of padding or border between
> elements). I could be totally off-base there though: I'm only on my
> first cup of coffee.
>
> Test Page:
> http://theholiergrail.com/focus-on-style/bottom-margin-collapse-with-overflow-auto.html

That is not a case of 'margin-collapsing'. :-)
In this case, the bottom-margin of the last-child paragraph is  
swallowed by the overflow on the parent box (the one with  
overflow:auto and height:100% set).

You'd have to look at CSS2.1:10.6, esp 10.6.3 and 10.6.6 (which is not  
so clear), and check CSS2.1:8.3.1

Opera 9.5, Gecko 1.9 (fx3), gecko 1.91.pre, WebKit (nightly build and  
Safari 3.1) are consistent in this.
IE6 & 7 also swallow the bottom-margin, as 'hasLayout' is true on the  
parent box.

See also this thread:
http://lists.w3.org/Archives/Public/www-style/2008Feb/thread.html#msg0
Philippe
---
Philippe Wittenbergh
http://l-c-n.com/





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