I currently working on a couple preludes and I would like to know your opinion about a certain spot on this one. It's at measure 23. The second RH top note shows a C, which would mean a C# because of the key signature. But Kissin and Argerich play it as a C-natural, as do a few other recordings I've heard. I have two Preludes books and they are both different from each other. My one book has an explanation at the bottom that reads: The C-natural in the Mikuli, Joseffy and other editions is incorrect. The Autograph has C#, as do the first French and German editions. If this is the case, why does everybody play it as a C-natural? What would you play?