Just wondering if anyone else can confirm this or find a fix. I have a 400+ image folder in iPhoto for my wallpapers, all of which are 1920x1080 or higher. My MacBook is the older 13" model with a resolution of 1280x800, so everything in there is consistently larger than my actual resolution. That said, after Mavericks, the options in setting the wallpaper (which allows for fit to screen, stretch, center, etc.) showed me that there's a huge issue. When I choose center, none of my wallpapers actually fill the screen, as if they're all smaller than 1280x800, and stretching them makes them look grainy, as if actually stretching them to fit if they're too small a resolution. This is super frustrating, as the little preview shows the centered image to be much larger, but the actual desktop does not reflect it. Manually choosing a file and setting it as the desktop picture does not work/make a difference either. This really sucks as I have many wallpapers, all of which now look like crap because they are not being rendered in their native resolution, even though ALL OF THEM are larger than my MacBook's 1280x800 native resolution. Is anyone else experiencing this? It's very very annoying and I hope there is a fix or workaround.