Was bug http://bugzilla.mozilla.org/show_bug.cgi?id=157969 splitted as requested. I'm sorry, I've searched and did not find that they have been reported, so I had them. Using : Chimera build 20020710 16:11 Mozilla 1.1a M$IE 5.21 http://www.bjoernsworld.de/test/margin-auto.html ALL: DIV not centered !! I include also the answer from another chimera board's user FYI as I'm not sure of what the result should be: Test 2: The element's width is auto by default. This makes the element fill the container. By setting the element's width property, the element will center itself.
The answer you got on the Chimera board is right. The DIV is being centered, but because it's 100% wide you can't see this.