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b. 40

composition: Op. 28 No. 19, Prelude in E♭ major

..

In the main text we add cautionary flats before the 3rd L.H. quaver (a) and the 6th R.H. quaver (a1). The R.H. accidental was also added in GE and EE.

category imprint: Differences between sources; Editorial revisions

issues: EE revisions , GE revisions

b. 41-42

composition: Op. 28 No. 19, Prelude in E♭ major

No pedalling in A (→FE1,FCGE)

   in FE2 (→EE)

[  ] suggested by the editors

..

The authenticity of the pedalling markings added in FE2 (→EE) is uncertain. On the other hand, leaving two bars without pedalling markings in a piece provided with detailed pedalling indications may be misleading, hence in the main text we suggest adding markings after analogous b. 1-2 and 33-34. Adopting a different solution here than in b. 9-12 is motivated by the fact that Chopin saw there the entire text and could evaluate whether repeating the markings from b. 1-4 was necessary; in turn, here all he saw were empty, numbered bars, which hampered such an evaluation.

category imprint: Differences between sources; Editorial revisions

issues: FE revisions

b. 43-44

composition: Op. 28 No. 19, Prelude in E♭ major

..

In the main text we add cautionary accidentals:  before b and  before g2 at the end of b. 43 and  before e before g and  before b1 in b. 44. Both accidentals in b. 43 were already added in EE. The flat before e in b. 44 was in A in the initial, crossed-out version of the L.H. part in that bar.

category imprint: Differences between sources; Editorial revisions; Source & stylistic information

issues: EE revisions , Cautionary accidentals

b. 43-44

composition: Op. 28 No. 19, Prelude in E♭ major

..

These bars underwent numerous corrections in A. In b. 43 Chopin changed single notes – he moved the 2nd and 5th R.H. quavers a minor third higher (c2→e2 and c2→d2) as well as the 3rd, 6th and 9th L.H. quavers (e→g, f→a and g→b).
In b. 44 the 2nd and 5th R.H. quavers were also changed (a1→c2 and a1→b1), whereas the L.H. part and the 3rd R.H. triplet were completely crossed out after individual corrections and rewritten on adjacent staves. The below reconstruction shows a likely interpretation of the crossed-out version. The small noteheads in brackets indicate the notes that were effaced before the decision to rewrite the whole. The illustration is supplemented by the first 2 R.H. triplets that were not rewritten as a whole, with individual corrections marked in a similar manner: 

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A , Deletions in A , Accompaniment changes

b. 44

composition: Op. 28 No. 19, Prelude in E♭ major

..

In the last R.H. triplet, A (→FC,FE) contains only the  lowering d3 to d3. In GE and EE, a  was added before the next quaver (d2), yet the overlooked  restoring g2 on the last quaver of the bar is absent in all sources.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Accidentals in different octaves , Omissions to cancel alteration , GE revisions , Inaccuracies in A , Errors repeated in GE , Errors repeated in FE , Errors repeated in EE