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. 26-27

composition: Op. 21, Concerto in F minor, Mvt II

Pedalling in A

Pedalling in GE1

Pedalling in FE (→EE)

Pedalling in GE2

..

In the main text we give the pedalling of A, since the authenticity of the addition introduced in GE1 (→FEEE) is uncertain. The doubts are raised by an inaccurate alignment of indications in this bar, the absence of the  sign in the previous one and a clumsy arrangement of the 1st beat of the bar. If, e.g. a sequence of  signs at the transition between bars 26 and 27 was originally printed as a whole in bar 27 (considering the 2nd quaver to be the beginning of the bar), Chopin could have added only the most sonically striking mistake, which was the omission of the  sign at the beginning of bar 27.
The version of FE, despite being apparently closer to the notation of A than GE1, was most probably forced by the dense arrangement of the text. In GE2 the additional change of pedal was removed, however, the placement of the previous signs was not adjusted.  

category imprint: Differences between sources

issues: EE revisions , Errors in GE , GE revisions

b. 26

composition: Op. 21, Concerto in F minor, Mvt II

 at end of bar in A & GE2

No sign in GE1 (→FE)

 after 5. quaver in EE

..

Omission of the  sign in GE1 (→FE) is certainly a mistake. The sign was added in EE (arbitrarily) and GE2 (after A).

category imprint: Differences between sources

issues: EE revisions , Errors in GE , No pedal release mark

b. 26-28

composition: Op. 21, Concerto in F minor, Mvt II

Dots in A & GE2

No marks in GE1 (→FEEE)

..

Omission of staccato dots under (over) the bass notes is certainly a result of inaccuracy of the engraver of GE1 (→FEEE).

category imprint: Differences between sources

issues: Errors in GE , GE revisions

b. 27-28

composition: Op. 21, Concerto in F minor, Mvt II

Slurs from 2nd quaver in A (→FEEE)

Half-bar slurs in EE

..

It is difficult to say whether the earlier beginning of the 1st slur in bar 27 and both in bar 28 in EE is an inaccuracy or a revision coming from the conviction that the notation of FE is inaccurate.

category imprint: Differences between sources

issues: EE revisions

b. 28

composition: Op. 21, Concerto in F minor, Mvt II

Fingering written into FED

No teaching fingering

category imprint: Differences between sources

issues: Annotations in teaching copies , Annotations in FED