I reckon that the problem was you have did the convertion 32 bits to 16 bits in DSS. As they say, they aren't a good graphic process. You can use it, but it is not the best tool.
Unhappily your file to download is already in 16 bits. I would like to have it as original 32 bits. The problem in red channel, with much artefacts, probably was improved with that convertion 32 bist to 16 bits
Well, my contribution, with Photoshop CS3. Please, don't ask me what or how I did. I don't remember. But I started with convertion from 16 bits to 32 bits in Photoshop, followed by reduction of red saturation, and many work with mask, layer mask, background selection, noise reduction in red channel, .... It was not easy.
For large scale, original resolution:
http://i1063.photobucket.com/albums/...l.jpg~original