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


Pedalling

b. 67-68

composition: Op. 28 No. 17, Prelude in A♭ major

 in A (→FCGE)

    in FE (→EE)

..

The lack of two pedal changes is arguably a mistake by the engraver of FE (→EE).

category imprint: Differences between sources

issues: Errors in FE

b. 90

composition: Op. 28 No. 17, Prelude in A♭ major

No  in A (→FCGE)

in FE (→EE)

..

The  mark added most probably by Fontana in the proofreading of FE (→EE) is almost certainly inauthentic. Chopin would intentionally omit  in the endings in a number of his pieces, cf., e.g. the Prelude in A major no. 7.

category imprint: Differences between sources

issues: FE revisions