Today I completely forgot to take a photo, so I’ve just picked this one from a series I had taken earlier, on the 4th of July to be precise. I processed it in GIMP on my Mac, and there’s something about those colour profiles that I don’t understand. I first chose this photo where I could see all my thumbnails at once, in iPhoto. Then opened it in GIMP, which told me a camera colour profile was found, and if I wanted to convert it to sRGB profile. I said yes.
Then the photo looked much less saturated in GIMP than it did in iPhoto. Thinking that this is the colour profile difference, I then added a bit of contrast and saturation with the curves tool, and saved it and uploaded it. But now it looks much greener than it did in GIMP. I don’t have the same problem with GIMP on Windows, so I think it must be something between GIMP and Mac. If anyone could shed some light on this, I’d be grateful.
I’m afraid I don’t have a Mac, so I can’t help you with your color issues. It’s possible that your web browser may be contributing to the whole mess. What browser are you using? I know that Firefox renders images a little differently than IE, and I assume that Safari must also make a choice about this as well.
Anyway, sorry I couldn’t really help. I do think the green looks really good on my computer, anyway.