From the middle of bar 50 to bar 52 there is no 
raising d
1 to d1 in A. The raising d2 to d2 in bar 52 is also absent. These are patent inaccuracies, typical of Chopin. In GE and FE2 (→EE) all the necessary accidentals were added.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: Accidentals in different octaves, GE revisions, Omission of current key accidentals, FE revisions, Inaccuracies in A, Errors repeated in FE
notation: Pitch