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


Ornaments

b. 656

composition: Op. 31, Scherzo in B♭ minor

Small crotchet in A (→FCGE1, →FEEE)

Acciaccatura in GE2 (→GE3)

..

In the main text we give the only authentic notation of the ornament, written in A. However, we accept the notation of GE2 (→GE3), since it almost certainly marks the same performance.

category imprint: Differences between sources

issues: GE revisions

b. 657

composition: Op. 31, Scherzo in B♭ minor

 without  in A (→FEEE) & GE2 (→GE3)

with [] suggested by the editors

No  in FC (→GE1)

..

The missing  in FC (→GE1) is most probably an oversight of the copyist (in b. 206, of which the discussed bar is an exact repetition, added in GE2 (→GE3).
The missing  over the mordent must be an inaccuracy of Chopin: see b. 74.

category imprint: Interpretations within context; Editorial revisions

issues: GE revisions , Omission of current key accidentals