333427 - occasionally a transparent PNG is not displaying correctly

Status: RESOLVED WORKSFORME

(Firefox :: General, defect)

Description

[Michiel van der Blonk]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.1) Gecko/20060111 Firefox/1.5.0.1

This is an annoying rendering bug, that happened only a few times in the past half year. It has been confirmed by everyone in our office on this particular website, but I think it happens only in maybe one out of a hundred visits. It has not been confirmed on other websites.

I created an isolated test page on which the bug has not appeared yet (for me):
http://test5.caribmedia.com/CSS/bugs/png.html

Reproducible: Sometimes

Steps to Reproduce:
1. go to http://www.ahata.com
Yep, that's it. No isolated example is possible, since it hardly ever happens. 


Actual Results:  
http://test5.caribmedia.com/CSS/bugs/logo_distorted.png

Expected Results:  
same, but without the glowing borders. See http://test5.caribmedia.com/CSS/bugs/logo_top.png or
http://www.ahata.com

Comment 1

[Joe McCabe]

My problem seems different to the examples being described here, but the description matches.

PNG images with transparencies seem to be consistently rendered incorrectly IF they were created by GIMP 2.x. Even more odd is that at least one of these images, when displayed within an HTML page, seems to show random bits of other images from Firefox memory:

Images:
http://www.pogues.com/Pics/BaseGraphics/Masthead.png
http://blogs.sun.com/roller/resources/dzm/php_crop.png

Weirdness when embedded:
http://www.pogues.com/
(the weirdness is Masthead.png from above)

Comment 2

[Joe McCabe]

> My problem seems different to the examples being described here, but the
> description matches.

Neglected to mention - This is using the nightlies. Problem has been observed for at least two weeks (since I upgraded to Fedora Core 5). Did not see the problem on Fedora Core 4 when I was building my own nightlies.

Right now:
Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9a1) Gecko/20060524 Minefield/3.0a1

Comment 3

[kontakt]

Attachment: Image which is not rendered correctly. In frame there is correctly rendered image. This is transparent white PNG. Sorry for my english ;]

Comment 4

[Steve England [:stevee]]

Reporter, do you still see this problem with the latest Firefox 2? If not, can you please close this bug as WORKSFORME. Thanks!

Comment 5

[Mats Palmgren (inactive)]

Please reopen the bug report if the original problem occurs in a trunk build.
http://ftp.mozilla.org/pub/mozilla.org/firefox/nightly/latest-trunk/

Joe McCabe, please file a new bug report on your problem if it still occurs.
(the URL http://www.pogues.com/ works for me)

-> WORKSFORME