Issues : Errors in EE

b. 8

composition: Op. 21, Concerto in F minor, Mvt II

No c1 in A (→GE) & EE2 (→EE3)

c1 in chord in FE (→EE1)

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An additional cnote on the 5th quaver is certainly a mistake. The correct text in subsequent EE is a result of a comparison with analogous bars 27 and 76 or GE1.

category imprint: Differences between sources

issues: EE revisions , Errors in FE , Errors in EE

b. 9

composition: Op. 26 No 1, Polonaise in C♯ minor

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The  indication, appearing in the repetition of bar 9 next to the G1-G octave in the L.H., in all editions, undoubtedly results from a misinterpreted correction of Chopin in A. While correcting the erroneous  indication, the composer overwrote a pedal's release sign on it (after all, too late). In GE2 (→GE3GE4GE5 was additionally arbitrarily changed to . The first indication could have been removed by Chopin in the proofreading of FE1. The absence of a respective correction in the analogous bar in the repetition is undoubtedly an oversight of Chopin or of the engravers.

category imprint: Graphic ambiguousness; Differences between sources

issues: Errors in FE , Errors in EE , Errors resulting from corrections , Errors in GE

b. 9-13

composition: Op. 25 No 9, Etude in G♭ major

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In GC (→GE1), FE and EE there are no naturals raising c to c in bars 9 and 13 and c1 to c1 in bar 12. These are Chopin's obvious oversights, while the signs were added in FED (in bar 9) and FEJ and FES (all).
GE1 also omitted the  raising c1 to c1 in bar 10. GE2 (→GE3) features the correct text. 

category imprint: Interpretations within context; Differences between sources

issues: Annotations in teaching copies , Errors in FE , Annotations in FED , Errors in EE , Errors in GE , GE revisions , Omission of current key accidentals , Annotations in FES , Annotations in FEJ

b. 9

composition: Op. 26 No 1, Polonaise in C♯ minor

category imprint: Differences between sources

issues: Errors in EE

b. 9

composition: Op. 35, Sonata in B♭ minor, Mvt I

3-note slur in GC (→GE), FE & EE2

Shorter slur in EE1

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A shorter slur in EE1 is certainly mistaken – cf. subsequent bars. The error was corrected in EE2.

category imprint: Differences between sources

issues: EE revisions , Errors in EE