In A a 
before the bottom note of the octave in the L.H. at the beginning of the bar is missing, as well as before the 3rd semiquaver in the R.H. in the 2nd half of the bar (d1). In turn, Chopin repeated a before B, the 2nd semiquaver in the L.H. In GE1 (→FE) only the missing before the octave was added, while in EE and GE2 – both necessary naturals. Moreover, EE3 added a cautionary before b in the L.H. in the 3rd group of semiquavers; the sign was also added in FED. In the main text we add two necessary naturals and we remove the superfluous sign before the 2nd semiquaver in the L.H.
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category imprint: Interpretations within context; Differences between sources
issues: Annotations in teaching copies, EE revisions, Annotations in FED, Accidentals in different octaves, GE revisions, Cautionary accidentals, Inaccuracies in A
notation: Pitch