User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0 Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8b2) Gecko/20050319 In an absolute block with overflow: hidden, a nested absolute block will have zero width when nested block's width is based on parent. Reproducible: Always Steps to Reproduce: See test case. Actual Results: The block containing "foo" is completely collapsed (but its border is visible, and its content overflows). Expected Results: The block containing "foo" should be entirely visible.

This renders as expected with the old layout engine.

I just discovered and can confirm this bug report (was about to file it myself). I have a very simple layout which I'll attach which is my version of showing the bug. The layout should show a small box which is 90% purple, with a 10% vertical strip on the right of blue. In latest firefox, it is all blue (the purple div, which is nested exactly as the original poster states, is an absolutely positioned nested element of a containing div block which has overflow hidden set, and the result is a zero width div in latest build). It works in Firefox 1.0.1 and ie 6, but not in yesterday's daily build: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.8b2) Gecko/20050319 Firefox/1.0+

very simple test case should render a square 100x100 pixels, purple in left 90%, with a blue strip occupying the rightmost 10%, as a vertical strip. in latest ff, it renders entirely blue.

Fixed a few weeks ago... *** This bug has been marked as a duplicate of 282754 ***