I think right now there's sort of a problem, where I'll find a wallpaper and discover it's a dupe (usually of an untagged or minimally tagged one) and, on investigation, I find the currently uploaded one is larger or even smaller size, of a different shape, and sometimes of a worse quality.
I think if you could upload 'duplicates' of wallpapers, of different resolutions, all under a stack found from the parent wallpaper, it would be nice.
During a search, a wallpaper parent that has a stack member of the right size or resolution could turn up as well, and this would also allow people who only search for a specific resolution to find a useable wallpaper they may love, even if the currently uploaded one is wrong for them.
Thoughts on this?