If somebody could help me whit what it seem to be some banding. I know that you probably could not zoom in, but I can see this using the thumbs: (Look at the light on the orange background)

http://www.shutterstock.com/pic-8978089-open-book-on-a-dynamic-orange-background.html

I have photoshop 6.0 (a dinosaur I know) Pictures taken in Jpeg and the problem seem to be that my photoshop work in 8 bits.

I try to put it in 16 bits but then the tools don't work anymore...

Do I need a better phtoshop version or to work in RAW to achieve more bits?

I had the same problem. I just worked on one image where I made an artificial sky, where exactly this happens. What I did was selecting the area with the problem applying slightly noise through a photoshop filter and then useing motionblur 90� of the direction of the banding. After that I applied again noise but this time just minimal as it is normal when taking an image of a sky. So it does not get rejected at iS for overfiltering. It worked in my Elements 2.0. the last time. Hope that helps.

Noise helps to prevent banding. If you used noise reduction, maybe that was the cause of the banding. Usualy directly out of my camera I never have problems with banding,  just when I do extensive work with photoshop. But I am not an expert.

I ran into this when I created an artificial sky. I ended up just reducing the variance between the two gradiant colors and that worked.