I am wondering what you think about the repeat sign at bar 4 in the first movement. It's found in virtually all current editions including Henle and Paderewski. The original French and London editions got it right, except for the German one. Even the Paderewski edition includes a copy of the first page of the manuscript and there is no repeat sign! This error has been contained in virtually all editions for 150 years.
This repeat is clearly wrong. Virtually all recordings, after the exposition, repeats at bar 4 even though harmonically it sounds wrong. The last harmony at the end of the exposition is a dominant of Db. A dominant of Db should lead to Db, not Bb minor at bar 4. If repeated at the beginning, then the harmony would resolve, but the repeat at bar 4, doesn't.
I tried telling my friend about this because she was learning it but she was skeptical saying that the repeat is there so one should repeat there, not the beginning. She also didn't think the dominant of Db needed to resolve to Db. Bb minor sounds fine to her and she, and I assume many others, prefer it to go to Bb minor! I even told her about the manuscript but still she was skeptical.
What do you think about this? I know the teachers at my school, especially the self-appointed Chopin expert, would have a pompous field day.