Uhh, it's not the forum attachment limit that's the problem. You can upload .rpls of up to 4.77MB on here. It's the fact that if you go over a certain limit, Toribash won't save the replay properly.
Try editing a few moves onto the end of Nuthug's replay, save it and see what happens. It should be a >1kb file rather than a <800kb file.
Oh and could the next person rate Marco's replay, thanks.