230762 - div displayed too far to the left if margin: 0px auto 0px auto with border

Status: VERIFIED DUPLICATE of bug 185411

(Core :: Layout, defect)

Description

[Alex Hirzel]

On the testcase which I will attach, notice the two divs and how they react to
resizing the page horizontally.  The top one stays anchored to the left of the
page in a visible position, while the bottom div stays absolutely centered in
the page, to the point at which part of it becomes inaccessable via scrolling. 
Not sure if this is a bug or a little-known implementation detail of the CSS spec.

Comment 1

[Alex Hirzel]

Attachment: Testcase of the bug

Comment 2

[Alex Hirzel]

Confirming and adding testcase flag.

Comment 3

[Jose Fandos]

With Mozilla 1.5 final (WindowsXP) I see the same behaviour, be it a bug or just
following standards. IE on the other hand stops both divs at the left hand side
of the browser window.

Comment 4

[Boris Zbarsky [:bzbarsky]]

This is a duplicate...

Comment 5

[Paul Norman]

Attachment: A slightly clearer testcase

Resizing is not required with this testcase.
http://www.w3.org/TR/CSS21/visudet.html#q6 implies that the borderless behavior
is correct.

Comment 6

[David Baron :dbaron: (⌚️UTC-4, no longer working on Mozilla)]

*** This bug has been marked as a duplicate of 185411 ***