Looking back at some web references I had bookmarked some months ago, I see that Mac operating systems have some additional issues with web color management. This site goes into great detail on web browser color management: Web Browser Color Management. I didn't reread the whole thing, but you might see if the Mac issues it discusses apply to your case. Since some users (like me) are reporting that Firefox v. 3.5.2 fixed their browser color management problem, but it didn't help others, maybe the difference is based on operating systems?
For anyone still willing to endure the torture....
Here's an example of what I'm seeing in two different set ups 1.Eizo display and 2.NEC 2690 WUXi
The image is the same file, a jpeg, sRGB.
From left to right: Image on my own web site viewed in Firefox or Safari; then same image in PS CS4; then same image where I just dragged it onto the Safari icon to open it using Safari
The Eizo display shows all images looking pretty much the same. That's fine, what you'd expect.
The NEC (wide gamut display) shows the PS version AND oddly the version I just dragged onto the Firefox icon the same, as I'd expect. The "live" website version is very saturated, especially red and green.
Could this be a Flash issue (I think my website from Livebooks uses Flash)? Could the oversaturated color I'm seeing on web sites be from content created using Flash?