I just found out something that I have never noticed before. (Banging head against wall a couple of times...) I am using Nikon ViewNX2 to convert NEF files to TIFF files. Now I can see that a lot of noice is added to the files in the convertion process, and that goes for both the 8 bits and the 16 bits convertions. It is particularly noticeable at high ISO's in for example dark clothing. So there is the reason for my complaint about D300 not being so good at high ISO values.....what do you know... I hope someone can do something about this quite quickly. It can't just be my files that are being affected. Nikon, please?