At the beginning of the 2nd half of the bar before the bottom note of the second, GC and FE1 (→FE2) have one 
before each of the notes instead of . This easy to detect mistake – none of these flats is necessary at this pitch, whereas a
1 appears in the part of the L.H. – was corrected in GE, by adding another before the bottom note. The correct notation is included in FE3 (→FE4) and EE, which in both cases could have been a result of Chopin's intervention.
A double flat before the top note of the penultimate chord was added only in GE and EE2.
Compare the passage in the sources»
category imprint: Interpretations within context; Differences between sources; Corrections & alterations
issues: EE revisions, Errors in FE, Accidentals in different octaves, GE revisions, Authentic corrections of FE, Errors of GC, Authentic corrections of EE
notation: Pitch