Select: 
Category
All
Graphic ambiguousness
Interpretations within context
Differences between sources
Editorial revisions
Corrections & alterations
Source & stylistic information
Notation
All
Pitch
Rhythm
Slurs
Articulation, Accents, Hairpins
Verbal indications
Pedalling
Fingering
Ornaments
Shorthand & other
Importance
All
Important
Main


b. 32-34

composition: Op. 25 No 8, Etude in D♭ major

..

The notation of the three-bar chromatic progression does not contain errors in the sources, yet some of the cautionary signs seem to be unnecessary. In the main text we leave only the naturals before and in the last triplet of each bar, as these are notes before which one can expect signs in the D major key (in A and FE Chopin omitted only the last of them, before e3 in bar 34, completed in GE1). In A (→GE1) and FE Chopin also added flats before a2 and b2 in bar 33 and a3 and b3 in bar 34. In EE, particularly in GE2 (→GE3), a few bars were added in each bar.
In Chopin notation it is the orthography of the 6th sixth in each of these bars that draws attention – Chopin consistently writes a-f instead of b-g, which are proper of the D major key. 

category imprint: Differences between sources; Editorial revisions

issues: EE revisions , GE revisions , Cautionary accidentals , Last key signature sign

b. 36

composition: Op. 25 No 8, Etude in D♭ major

Arpeggio sign in A (→GE) & EE3

No sign in FE & EE1 (→EE2)

..

The arpeggio sign was probably added by Chopin as part of the first phase of final retouch of A (written with ink), as it was not included both in FE and EE1 (→EE2). The sign in EE3 was most probably repeated after GE.

category imprint: Differences between sources