210040 - PNG background images appear lighter in mozilla than IE

Status: VERIFIED DUPLICATE of bug 220574

(Core :: Layout: Images, Video, and HTML Frames, defect)

Description

[ej30842]

User-Agent:       Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030612
Build Identifier: Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.4) Gecko/20030612

At for instance http://nintendoinsider.com/index.php, among others, you will
notice the .PNG background image appears lighter than in i.e. Internet Explorer
and, as a result, things such as images which use the background (see top image
on nintendoinsider) appear really strange. 

Reproducible: Always

Steps to Reproduce:
1. go to nintendoinsider.com
2. look at the background
3. refresh if you want

Actual Results:  
The .PNG background image appears lighter than in i.e. Internet Explorer and, as
a result, things such as images which use the background appear really strange. 

Expected Results:  
The .PNG background should have appeared darker like in Internet Explorer.

I was using "Modern" theme.

Comment 1

[Jesiah S]

Gimp reports the background image has a color of #505050 and the background
color of the top image is #454545 .
LInux 2003062305

Comment 2

[Glenn Randers-Pehrson]

MSIE does not handle the gAMA chunk correctly.  Pages that are designed to
work around that problem will not look exactly right on standards-conforming
viewers such as Mozilla.  So this bug should be filed against MSIE, not here.

There is a workaround for web page authors: If the PNG is in the sRGB colorspace
(i.e., has the gAMA chunk with gamma=1/1.2), which is likely, you can remove the
gAMA chunk and install an sRGB chunk.  Such PNGs are displayed properly by both
MSIE and Mozilla.

Comment 3

[Joël Kuiper]

*** This bug has been marked as a duplicate of 220574 ***