There's some file format information in this post of mine:
http://forum.portraitartist.com/show...id=897#post897
And yes, if the conversation gets too much more into digital cameras, it should go in the proper section.
Tim, if by "breaking apart" you mean the pixelation seen in the lines of the floor and a bit in her eyelid area, it looks like something that is the result of sharpening the image. A certain amount of that is unavoidable. Unsharp mask gives more controls of this and is actually always preferable over simple sharpen.