850015 - The child element is re-positioned when I resize browser window

Status: RESOLVED DUPLICATE of bug 851514

(Core :: Layout, defect)

Description

[Alice0775 White]

Attachment: testcase

Build Identifier:
http://hg.mozilla.org/mozilla-central/rev/eccf45749400
Mozilla/5.0 (Windows NT 6.1; WOW64; rv:22.0) Gecko/20130311 Firefox/22.0 ID:20130311030946

This problem does not happen in IE, Opera and Chrome.

Reproducible: always

Steps to Reproduce:
1. Open testcase
2. Resize browser window

Actual Results:
 The child element is re-positioned when I resize browser window

Expected Results:
 The child elemnt should be positioned properly without resizing browser window

Regression window
Good:
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9a1) Gecko/20061207 Minefield/3.0a1
Bad:
Mozilla/5.0 (Windows; U; Windows NT 6.1; en-US; rv:1.9a1) Gecko/20061208 Minefield/3.0a1

Bonsai log:
http://bonsai.mozilla.org/cvsquery.cgi?treeid=default&module=all&branch=HEAD&branchtype=match&dir=&file=&filetype=match&who=&whotype=match&sortby=Date&hours=2&date=explicit&mindate=2006-12-07+00%3A00%3A00&maxdate=2006-12-08+03%3A00%3A00&cvsroot=%2Fcvsroot

Suspected: Bug 300030

Comment 1

[Alice0775 White]

Attachment: screenshot

Comment 2

[mjh563]

Strange, I can reproduce this in a new profile but not in my normal profile. In my normal profile it's correct even without resizing.

Comment 3

[mjh563]

(Sorry, ignore the last comment. It was being affected by an extension adding something to the DOM.)

Comment 4

[Boris Zbarsky [:bzbarsky]]

Dupping forward to bug with patch.