Allen Garvin's Frescobaldi uploads: the originals are in open score and Allen's scores are exactly the same. Not arrangements. (The modern notion of "arrangement" is highly anachronistic here! Simply splitting the [keyboard] voices into four individual parts for ensembles' convenience is not an "arrangement".)
IMSLP:Quick Guide to Score Submission: no longer "quick" and berates the reader at length (!). Should be cut back and rewritten without the rant. A simple, clearly worded provision to only make a single submission at first (etc) would be much more appropriate.
project for a bot, or a programming challenge: SBB transclusions - check every one of ~3900 transclusions to see if they include "PPN" before the number. Much better would be to check the input to see if it includes "PPN" and add it if not.