Mark, what you posted is a JPG, there is no way we can analyze what the problem is in the PNG file if you convert iot to JPEG. Please post the original, untouched file. There is no reason for a color shift when saving the image from Studio.
If the image is too large use YouSendIt, it's free, just use the Lite version http://www.yousendit.com/cms/liteaccount

Paolo

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