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


Shorthand & other

b. 83

composition: Op. 50 No. 2, Mazurka in A♭ major

No repeat in A1 & EE

Repeat in FE & GE

..

The repeat sign of the section that comes to an end here is an addition introduced by Chopin in the last stage of proofreading of FE as well as in GE or – which seems more likely – still in [A2]

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE