Issues : Omission of current key accidentals

b. 31-63

composition: Op. 30 No. 2, Mazurka in B minor

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In FE there is no  raising e1 to e1 in bars 31 and 63. The oversight, probably by Chopin in [A], was corrected in EE.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in FE , Omission of current key accidentals

b. 39-47

composition: Op. 30 No. 2, Mazurka in B minor

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There is no accidental to the last grace note in bars 39 and 47 in FC, while in FE in bars 39, 45 and 47. The patent oversights, the ones in bars 39 and 47 most probably by Chopin himself, who considered the earlier  to g1 to be sufficient, were corrected in GE (in bar 39 a  was added to FC already by the reviser) and in EE.

category imprint: Interpretations within context; Differences between sources; Source & stylistic information

issues: EE revisions , Errors in FE , Accidentals in different octaves , GE revisions , Foreign hand additions in manuscripts , Omission of current key accidentals , Errors of FC