User-Agent: Opera/9.23 (Windows NT 5.1; U; en) Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.9b2pre) Gecko/2007112905 Minefield/3.0b2pre Seems like the problem is that Firefox doesn't treat absolute positioned element as block element. CSS 2.1: Absolute positioning: "An absolutely positioned box establishes a new containing block for normal flow children and absolutely (but not fixed) positioned descendants." Reproducible: Always Actual Results: Inline absolute positioned element treated as inline element. Expected Results: Inline absolute positioned element should be treated as block element. Opera 9 and Safari 3 do in right.
The layout in Firefox is correct. You haven't specified 'left' for the abs.pos. box so it will use the "static position" (roughly, where it would be positioned had it not been styled with 'position:absolute') http://www.w3.org/TR/CSS21/visudet.html#abs-non-replaced-width If you want the same layout as in Opera you could add an explicit 'left:0'. The bug really is in Opera and Safari, but the spec language is vague in this area, saying that: "But rather than actually calculating the dimensions of that hypothetical box, user agents are free to make a guess at its probable position." -> INVALID
Status: UNCONFIRMED → RESOLVED
Last Resolved: 11 years ago
Resolution: --- → INVALID
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