The version of JC seems to be erroneous, however, it is not clear how the notation of [AI] – probably ambiguous – was like and consequently, which elements of the notation of JC should be corrected. According to us, among the possible errors the most probable ones are the following two: lack of the 
raising c4 into c4 or writing mistakenly a 
instead of the before the second grace note. We consider the first possibility as an interpretation of the copy's notation; the second one leads to the version of PE, adopted as the main text. The version of EF is probably a result of Fontana's revision, its correspondence to Chopin's intentions is highly unlikely.
category imprint: Interpretations within context; Differences between sources
issues: Errors of JC
notation: Pitch