Strange graphics issue when looking at JPGs in Safari and Preview.

I am having an issue in Safari and Preview under OS X 10.4.11. I have the exact same issue in both Safari 3 and 4(beta). The blacks on JPG images aren't black they are a dark brownish grey, all other colours show up properly. If I open the same website in Flock everything looks fine. If I download the image and open it up in Photoshop the image also looks fine. To make it even stranger if I open the image up in photoshop and re-save it as a tif file and open the tif file in Safari or Preview it looks normal. It just how it's handling JPGs!
See the following link for an image showing the issue... note the dark brownish grey colour around the watch:
http://c77ilw.blu.livefilestore.com/y1p66KB-yBArvIBleY3s1wGZ8EgAyxRd8VLnJ9XA9zJz gPUgIBbvM5aSqPz59g1nC5TehmACKYCw/Picture%201.png
Now look at what it's supposed to look like:
http://c77ilw.blu.livefilestore.com/y1pLSnu9AVt-IrsQNhBYUAS6OAAGQU2Tm7H8P9JPp9ba h4Y9wJR9bRYAGu6gLBodHXwGZaPqtzSUyI/1236465600.jpg
Any ideas? I've tried googling everything I can think of about this issue and haven't found anyone with the same or similar situation.

I believe it to be an issue with how Safari and Preview are displaying colours under OS X, the strange thing is about 4 weeks ago I had not problems with Safari displaying these types of images and can't think of any settings I changed around that time. Safari under Windows does not show this issue and it is not showing the issue on a different Mac running Safari under OS X 10.4.11 either, so it has to be a setting somewhere that inadvertently was changed I think.
Again it is only showing on black and near black colours no other part of the image is affected.
Below is a link I made in photoshop comparing a screen grab of the issue (top half) vs a downloaded copy (bottom half) of the image with raised curves to accentuate the difference for those who may have darker gamma settings and are having trouble seeing the problem.
http://c77ilw.blu.livefilestore.com/y1pkqqQbO439AUl0M1foDBBRwDdtSImNu9Nnmfc4LJMW CahrzW7FgljMfom6ikxcR8KrheOhGosfKf4UiYzKYRePA/Graphic%20issue.jpg

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