Issues : Inaccuracies in FC

b. 47-48

composition: Op. 25 No 6, Etude in G♯ minor

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The notation of accidentals in the sources shows significant inaccuracies and differences, which, however, do not cause any difficulties in interpreting Chopin's intentions. Due to the use of an octave sign in some of the sources, it is also unclear which signs have to be considered as necessary.
The most serious mistake is included in EE1, in which in bar 47 there is not a single  lowering a to a. FC (→GE1) and FE include a  giving an a3 before the 1st semiquaver; the sign was added only in EE2 (→EE3) together with a respective  in the L.H. In bar 48 in FC, FE and EE1, the  giving a1 appears only before the 3rd semiquaver; the necessary sign at the beginning of the bar was added in GE1 and EE2 (→EE3), yet only in EE2 (→EE3) the superfluous in this situation sign before the 3rd third was deleted. It is only GE2 (→GE3) that includes the completely correct notation.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Inaccuracies in GE , Inaccuracies in FE , GE revisions , EE inaccuracies , Inaccuracies in FC

b. 58

composition: Op. 25 No 6, Etude in G♯ minor

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Lack of the  returning d2 is a typical inaccuracy of Chopin notation. The sign was added only in GE2 (→GE3).

category imprint: Interpretations within context; Differences between sources

issues: Inaccuracies in GE , Inaccuracies in FE , Omissions to cancel alteration , GE revisions , EE inaccuracies , Inaccuracies in FC