d3 in 
In FE no naturals lowering d
3 to d3 in b. 470 or d2 to d2 in b. 472 must be seen as errors, which is further confirmed by their lack in GC, despite the fact that Chopin personally filled them in. Naturals in EE may have been added based on the previous three corresponding occurrences of this phrase (bars 176, 220 and 308). Sharps in bars 445, 447, 466 also show that Chopin was not sure over a longer phrase if 
(d) belonged to the key signature.
Compare the passage in the sources»
category imprint: Differences between sources
issues: EE revisions, Omission of current key accidentals, Last key signature sign, Authentic corrections in GC
notation: Pitch