It is unclear how the difference in the rhythm in this place was created, however, none of these two versions seems to be erroneous. The notation of EE indicates a possibility of the engraver's error – the b1 semiquaver is placed closer to the bar line than the g
semiquaver, therefore, it is possible that in the base text to EE the rhythm was the same as in GC. It also cannot be excluded that the additional dot and beam were added in GC by Chopin, although the graphical image of the notation rather does not confirm it. Due to the above ambiguities, in the main text we give the double dotted rhythm, present in the base source (GC).
Compare the passage in the sources»
category imprint: Differences between sources; Corrections & alterations
issues: Accompaniment changes, Authentic corrections in GC, Dotted or even rhythm
notation: Rhythm