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b. 23

composition: Op. 25 No 11, Etude in A minor

Octave in GC (→GE), FE & EE3

E1 in EE1 (→EE2)

..

The single E1 in EE1 (→EE2) is probably authentic, yet one cannot entirely exclude a misinterpretation of the autograph. Cf., e.g., the Waltz in A major, Op. 42, bar 48. Introduction of an octave in EE3 is almost certainly a result of comparison with GE.   

category imprint: Differences between sources

b. 24

composition: Op. 25 No 11, Etude in A minor

b1 in GC (→GE)

g1 in FE & EE

..

The version of GC (→GE) is almost certainly erroneous – the copyist could have copied it only from one of the remaining Stichvorlage manuscripts, and it is absent both in FE and EE.

category imprint: Differences between sources

issues: Terzverschreibung error , Errors of GC

b. 25

composition: Op. 25 No 11, Etude in A minor

..

In GC and FE there is no  returning g1. This patent error was corrected in GE. EE also includes the correct text.

category imprint: Interpretations within context; Differences between sources

issues: Errors in FE , Omissions to cancel alteration , GE revisions , Errors of GC

b. 27-30

composition: Op. 25 No 11, Etude in A minor

..

In the passages including a few octaves, there are no accidentals in the sources, which, however, does not raise doubts concerning the text intended by Chopin.

In GC there are no sharps needed in the notation of f1f2 in bar 27, ff1f2 in bar 28, f2f1 (L.H.), c1 in bar 29 and fd2 in bar 30.
In FE the same signs apart from the sharps before f1 in bar 27 and f1 (L.H.) in bar 29 were omitted; moreover, the  raising d2 to d2 in bar 29 was overlooked.
GE1 completed the signs overlooked in GC except for the  raising f1 to f1 in the L.H. in bar 29.
In the remaining editions – EE and GE2 (→GE3) – all necessary signs were added.

category imprint: Interpretations within context; Differences between sources

issues: EE revisions , Errors in FE , GE revisions , Omission of current key accidentals , Errors of GC

b. 33

composition: Op. 25 No 11, Etude in A minor

f in GC (→GE) & EE3

f in FE & EE1 (→EE2)

..

The version of GC (→GE) was most probably taken into account by Chopin in all Stichvorlage manuscripts, which is indicated by the presence of  before on the last semiquaver of the bar both in GC and EE and FE, in which, however, the sign was removed at the time of proofreading. At the same time, the proofreading proves that the version of FE – with on the 2nd semiquaver of the last group, preserving the harmonic regularity of the figuration – was eventually approved by Chopin as valid.

category imprint: Differences between sources; Corrections & alterations

issues: Authentic corrections of FE