A is missing the 
before the penultimate semiquaver (b). Chopin noticed this patent inaccuracy while proofreading FE, yet initially the sign was erroneously inserted before the last note (d1), which was reproduced in GE1 (→GE2). In the last proofreading of FE (→EE), the was moved to the right place, a relevant addition was also introduced in GE. In GE3 (→GE4), the superfluous sign before d1 was removed.
Compare the passage in the sources »
category imprint: Interpretations within context; Differences between sources
issues: Errors in FE, GE revisions, Omission of current key accidentals, Authentic corrections of FE
notation: Pitch