278103 - Rendering errors when object (flash movie) layered above iframe

Status: RESOLVED EXPIRED

(Firefox :: General, defect)

Description

[Larry Howard]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.7.5) Gecko/20041107 Firefox/1.0

When layered above an iframe using CSS positioning, a flash movie is rendered
below the iframe when the page loads.

The example page is organized into four quadrants:

In the upper left quadrant, a flash movie is layered above an iframe.
The lower left quadrant is the same, except that the iframe loads no content.
In the upper right quadrant, the flash movie is layered above a div.
In the lower right quadrant, a div is layered above an iframe.

The two right-side quadrants render correctly and are provided for reference. 
The simple flash movie in the example inverts its colors in response to
mouseover events to provide a bit of behavior.



Reproducible: Always

Steps to Reproduce:
1. Load (or reload) the example page.
2.
3.

Actual Results:  
The flash movie is rendered below the iframe in both the left quadrants.

Expected Results:  
The flash movie should be rendered above the iframe in both the left quadrants.

Observations (using the upper left quadrant in the example):

1. The flash movie recieves mouse events as though it were on top.  It then
renders to the top.

2. When a link is selected in the iframe the flash movie is again rendered to
the bottom.

3. Resizing the browser window restores the flash movie to the top.

4. Mousing over the Mozilla icon in the iframe content causes part of the flash
movie to be improperly redrawn.

To help eliminate the Flash player as the culprit, I used Mac OS X, where Safari
and Firefox share the same player.  Safari renders the example correctly (as
does Internet Explorer on Win2K and WinXP) and Firefox Mac exhibits nearly the
same rendering behaviors as for the Windows platforms.  However, the differences
between Firefox Mac and Firefox Windows are noteworthy:

1. The lower left quadrant (no content loaded into iframe) renders correctly on
Firefox Mac.

2. In the upper right quadrant (flash movie layered above div) Firefox Mac
seemingly renders the flash movie below the div.

Comment 1

[Gervase Markham [:gerv]]

This is an automated message, with ID "auto-resolve01".

This bug has had no comments for a long time. Statistically, we have found that
bug reports that have not been confirmed by a second user after three months are
highly unlikely to be the source of a fix to the code.

While your input is very important to us, our resources are limited and so we
are asking for your help in focussing our efforts. If you can still reproduce
this problem in the latest version of the product (see below for how to obtain a
copy) or, for feature requests, if it's not present in the latest version and
you still believe we should implement it, please visit the URL of this bug
(given at the top of this mail) and add a comment to that effect, giving more
reproduction information if you have it.

If it is not a problem any longer, you need take no action. If this bug is not
changed in any way in the next two weeks, it will be automatically resolved.
Thank you for your help in this matter.

The latest beta releases can be obtained from:
Firefox:     http://www.mozilla.org/projects/firefox/
Thunderbird: http://www.mozilla.org/products/thunderbird/releases/1.5beta1.html
Seamonkey:   http://www.mozilla.org/projects/seamonkey/

Comment 2

[Gervase Markham [:gerv]]

This bug has been automatically resolved after a period of inactivity (see above
comment). If anyone thinks this is incorrect, they should feel free to reopen it.