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. 31

composition: Op. 25 No 6, Etude in G♯ minor

..

Before the 1st semiquaver in the R.H. in FC (→GE1), FE and EE there is no  lowering b3 to b3. This patent inaccuracy was corrected in GE2 (→GE3).

category imprint: Differences between sources

issues: Errors in FE , Accidentals in different octaves , Errors in EE , GE revisions , Errors of FC

b. 31

composition: Op. 25 No 6, Etude in G♯ minor

..

Cautionary naturals before b1 and b2 in the last pair of semiquavers are only in FE and GE2 (→GE3). In EE, the  is only in the L.H.

category imprint: Differences between sources

issues: EE revisions , GE revisions , Cautionary accidentals , Authentic corrections of FE

b. 31

composition: Op. 25 No 6, Etude in G♯ minor

No marking in FC (→GE) & EE

in FE

..

It is highly likely that Chopin added  at the time of proofreading FE (or introducing last corrections to the base text, probably [A]). All changes, certainly or highly likely introduced into FE at the transition between bars 30-31 – rhythmic notation of the last quaver in bar 30, omission of the tie of b1 and pedalling and  in bar 31 – may be considered as related.

category imprint: Differences between sources

issues: Authentic corrections of FE

b. 34

composition: Op. 25 No 6, Etude in G♯ minor

..

In the 2nd half of the bar, in FC (→GE1), FE and EE1 there are no sharps raising c1 to c1 and d1 to d1. EE2 (→EE3) completed the second one of them, while GE2 (→GE3) – both.

category imprint: Interpretations within context; Differences between sources

issues: Accidentals in different octaves , Inaccuracies in GE , Inaccuracies in FE , GE revisions , Inaccuracies in FC

b. 36

composition: Op. 25 No 6, Etude in G♯ minor

c2-e2 in FC (→GE1), FE, EE & GE2 (→GE3)

d2-f2 in GE1b

..

The version of GE1b with the d2-f2 third results most probably from the re-engraving of the final fragment of this bar due to wear and tear of the engraver plate (cf. similar situations in Andante spianato from Op. 22 or Concerto in F minor, op. 21, mvt. I). The remaining sources have notes at the correct height (which does not mean that the text is correct – see the previous note in this bar).

category imprint: Differences between sources

issues: Errors in GE