Three flats before g
notes visible in A, written later with a foreign hand, were not included in GE1. The same applies to the cautionary 
before G at the beginning of bar 324. The natural harmonic context allows to guess the correct text even without these signs; however, all doubts are dissipated by the Chopin proofreading of FE (→EE), in which all necessary flats in bar 322 were added as well as a cautionary 
before A at the end of bar 323 and E at the end of bar 324. GE2 included the signs added in A, adding also a fourth one, a necessary in bar 322 (before the penultimate semiquaver).
category imprint: Interpretations within context; Differences between sources
issues: GE revisions, Foreign hand additions in manuscripts, Authentic corrections of FE
notation: Pitch