Before uploading, I try to check if a wallpaper exists. Occasionally, I find that the wallpaper exists, but in a lower resolution than the copy I have. I think it would be nice to have a way to replace the original with the higher res.
I'm not sure what that would look like. If it was something you could do at any time, then it would open up a can of worms where people's wallpapers could get replaced when they shouldn't. It would probably have to be reviewed by an admin, or the original uploader. Any thoughts?
I know I can always upload the new version and report the old one, but I don't want to put a bad mark against the original uploader. So I don't do that.