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


Rhythm

b. 43-44

composition: Op. 25 No 7, Etude in C♯ minor

..

In GC one can see Chopin correction from the following original version: .

category imprint: Corrections & alterations; Source & stylistic information

issues: Authentic corrections in GC