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


b. 40

composition: Op. 26 No 1, Polonaise in C♯ minor

Slur in A (contextual interpretation) & in GE2 (→GE3GE4GE5)

Slur in FE (→GE1,EE)

..

The slur of A, although poorly written, is most probably supposed to begin in the middle of the bar, together with the continuation of the melody of the top voice. However, in FE (→GE1,EE) the slur started erroneously already from the 1st note in bar 40. In GE2 (→GE3GE4GE5) an accurate revision was performed, by writing the slur from the beginning of the triplet. 

category imprint: Graphic ambiguousness; Differences between sources

issues: Inaccuracies in FE , Inaccurate slurs in A , GE revisions

b. 40

composition: Op. 26 No 1, Polonaise in C♯ minor

..

GE2 (→GE3GE4GE5) & EE2 added two crotchet rests in the bottom voice of the L.H. In this type of context Chopin would often omit rests, as the moment of playing the notes was clear thanks to the vertical alignment of notes.

category imprint: Differences between sources

issues: GE revisions

b. 40

composition: Op. 26 No 1, Polonaise in C♯ minor

category imprint: Differences between sources

issues: Errors in EE

b. 42

composition: Op. 26 No 1, Polonaise in C♯ minor

..

In A Chopin wrote an unjustified cautionary  next to g1. The sign was removed in GE2 (→GE3GE4GE5).

category imprint: Differences between sources

issues: GE revisions , Cautionary accidentals

b. 42

composition: Op. 26 No 1, Polonaise in C♯ minor

..

In GE there is no tie sustaining d2, the last note of the written grupetto. It is undoubtedly a mistake of the engraver.

category imprint: Differences between sources

issues: Errors in GE