In the R.H. part, FE has only two naturals in the first semiquaver triplet. This inaccuracy, typical of Chopin, was corrected in the remaining editions – GE1 (→GE2) added a 
before the penultimate semiquaver of the bar, while EE and EE3 – also before the 7th semiquaver.
Compare the passage in the sources »
category imprint: Differences between sources; Editorial revisions
issues: EE revisions, Inaccuracies in FE, GE revisions, Cautionary accidentals
notation: Pitch