A bit of bad news about Vista if you're a photographer. Apparently if you tag a photo's metadata in Vista, it destroys other important metadata used by image editing apps such as Photoshop. Microsoft's gotten reports of RAW files generated by Nikon cameras being unreadable after being tagged with Vista or Microsoft's Photo Info tool.
What can you do? Well, Microsoft's asking camera vendors to make processing plugins for Vista that don't make images unreadable, but for the mean time we'd just recommend not updating to Vista until everything's fixed. Or just not tagging your stuff in Vista.