BGR noted that after you install iOS 4, all of your photos seem to be downsampled to tiny versions, which look horrendous. This was something I noticed too, when I tried to set a wallpaper from a saved file. However, there seems to be any fix. Syncing again seems to have fixed the images, and they’re now all the correct size. It must just have been a bug during the original restore after the new OS was put in.
Anyone else hit any roadbumps during installation (apart from it taking a dog’s age)?