No problem, I've done that and I can confirm that the problem was caused by Feh; I uncommented that line and scrolled through a few wallpapers and the problem occurred again (Nautilus exiting) within a minute or two. I tried all the others line by line and even altogether, scrolling through the wallpaper collection a few times without any problems. Just to be sure, I went back and uncommented only the Feh line again and once again Nautilus crashed after just a handful of wallpaper changes. So it certainly appears to be a Feh problem.
No problem, I've done that and I can confirm that the problem was caused by Feh; I uncommented that line and scrolled through a few wallpapers and the problem occurred again (Nautilus exiting) within a minute or two. I tried all the others line by line and even altogether, scrolling through the wallpaper collection a few times without any problems. Just to be sure, I went back and uncommented only the Feh line again and once again Nautilus crashed after just a handful of wallpaper changes. So it certainly appears to be a Feh problem.
Thanks again and I hope this is useful.