When a question is marked as a duplicate, the duplicate blockquote bleeds into the summary, which then leads to confusion over where the duplicate title ends and the question body begins.
Consider this question:
What's the name of the duplicate here? Is it "Keeping folders synced between several machines I own" or "Keeping folders synced between several machines"? (this isn't the greatest example, but you get the idea) Why is the duplicate warning bleeding into my question anyway?
How could this be fixed? Well, why not insert a simple pipe character or a dash? Both are much less intrusive and complicated than a new line or new markup. Using this I can actually see where the title ends and the question begins when titles don't have punctuation.