I was surprised when I clicked on a folder of raw images I’d taken with my Nikon D70 in Windows Vista and there were no thumbnails. I thought I had that ability in Windows XP but couldn’t remember if I did something extra to do it. I guess I just expected it to work in Vista. No worries though, after some clicking around I found this page on Nikon’s site with a raw codec for Windows Vista and now I’ve got thumbnails for all those .nef files!