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. 17

composition: Op. 28 No. 22, Prelude in G minor

..

EE omitted the  sign at the end of bar.

category imprint: Differences between sources

issues: Errors in EE

b. 19

composition: Op. 28 No. 22, Prelude in G minor

..

A (→FE,FCGE) has no  lowering a1 to a1. The obvious inaccuracy was spotted only in EE.

category imprint: Interpretations within context; Differences between sources

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

b. 21-29

composition: Op. 28 No. 22, Prelude in G minor

..

In the 2nd half of b. 21, A (→FC) places an unjustified  before d2, but omits a  raising f1 to f1. Equally in b. 29 which in the manuscripts is only marked as a repetition of b. 21. The overlooked  was added in all editions except FE in b. 29. In both bars EE removed the unnecessary , we include this revision in the main text.

category imprint: Interpretations within context; Differences between sources; Editorial revisions

issues: EE revisions , Accidentals in different octaves , GE revisions , Cautionary accidentals , FE revisions , Inaccuracies in A , Errors repeated in FE

b. 22-30

composition: Op. 28 No. 22, Prelude in G minor

No marking in A (→FC,FEEE) & GE2 (→GE3)

in GE1

..

 in GE1 resulted from an erroneous interpretation of the letter in b. 22, with which Chopin marked that bar as part of the abbreviation used for the notation of b. 25-32. The indication was also repeated in b. 30. Both erroneous markings were removed in subsequent GE. A similar mistake was committed in GE in the Polonaise in A Major, Op. 40 No. 1, b. 39 and analog., where the letter used in the abridged notation of repeated bars was printed as 

category imprint: Differences between sources

issues: Errors in GE , GE revisions

b. 23-24

composition: Op. 28 No. 22, Prelude in G minor

..

The crossings-out and corrections visible in A reveal that Chopin initially wrote 4 bass octaves as dotted crotchets. 

category imprint: Corrections & alterations; Source & stylistic information

issues: Corrections in A , Deletions in A