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


Verbal indications

b. 27

composition: Op. 10 No 12, Etude in C minor

 in A

No marking in FE (→GE,EE

Our variant suggestion

..

In the further part of the bar Chopin performed corrections in FE, the omission of  at the beginning of the bar seems to be however the engraver's oversight.

category imprint: Differences between sources

issues: Errors in FE

b. 33

composition: Op. 10 No 12, Etude in C minor

in A

No indication in FE (→GE,EE

Our variant suggestion

..

We consider the indication's omission to be a more plausible explanation for its lack in FE (→GE,EE) than the composer's correction.

category imprint: Differences between sources

issues: Inaccuracies in FE

b. 34

composition: Op. 10 No 12, Etude in C minor

Dashes in A

No dashes in FE (→GE,EE

..

Omitting the dashes determining the range of a dynamic change is one of the most frequent inaccuracies of FE.

category imprint: Differences between sources

issues: Inaccuracies in FE

b. 37

composition: Op. 10 No 12, Etude in C minor

in A

in FE (→EE)

in GE

..

 in FE (→EE) instead of  in A is most probably a result of the engraver's error. In the entire Op. 10 a similar mistake was committed on a number of occasions (in the Etudes in A minor, No. 2, bar 12, E major, No. 3, bar 54, C minor, No. 4, bars 1, 8, 16, 26, 54, E minor, No. 6, bars 21 and 32). On the other hand, the origin of  in GE is unclear, although the presence of this mark in this place is possibly a mistake too.  

category imprint: Differences between sources

issues: Inaccuracies in FE , GE revisions

b. 43-45

composition: Op. 10 No 12, Etude in C minor

 in A

Two  in FE (→GE1GE2, →EE)

One  in GE3 (→GE4)

category imprint: Differences between sources

issues: Inaccuracies in FE , Errors in GE , GE revisions , Authentic corrections of FE