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b. 124

composition: (Op. 4), Sonata in C minor, Mvt I

..

In A (→GEEE1,IE) there is no accidental to the bottom note of the 1st third in the 2nd half of the bar, which results in e2. What is more, 2 quavers later we see a  to e2, which seems to confirm e2 in this place. Nevertheless, the L.H. chord featuring e1 as the topmost note, played simultaneously, points to Chopin's patent mistake. It was noticed and corrected only in FE and EE2. Incidentally, a similar situation in A in analogous bar 126 was corrected already in GE.
In the main text we add a necessary  to the 5th quaver and omit the accidental to the 7th quaver, which is no longer necessary in this context.

category imprint: Interpretations within context; Differences between sources

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

b. 124

composition: (Op. 4), Sonata in C minor, Mvt I

Slur to 6th quaver in A, literal reading

Slur to 7th quaver in GE (→FE,EE,IE)

..

The fact that the A slur ends already on the 6th quaver in the bar is musically unjustified. This is confirmed by the comparison with similar figures, e.g. in bar 126. Due to the above, to the main text we adopt a slur led to the 7th quaver, as in GE (→FE,EE,IE).

category imprint: Differences between sources; Editorial revisions

issues: Inaccurate slurs in A , GE revisions

b. 124

composition: (Op. 4), Sonata in C minor, Mvt IV

..

In A at the beginning of the 2nd half of the bar the  to the R.H. top voice crotchet is missing. Chopin's patent oversight was corrected in GE (→FE,EE,IE).

category imprint: Interpretations within context; Differences between sources

issues: GE revisions , Omission of current key accidentals , Errors of A

b. 124

composition: (Op. 4), Sonata in C minor, Mvt IV

Staccato dot in A, contextual interpretation

No mark in GE (→FE,EE,IE)

..

The mark visible in A over the d2 crotchet is in the shape of a small vertical accent. The comparison with the marks in the analogous situations in the next bar reassures us, however, that it was almost certainly supposed to be a staccato dot. In GE (→FE,EE,IE) the mark was ignored.

category imprint: Graphic ambiguousness; Differences between sources

issues: Errors in GE , Inaccuracies in A

b. 124

composition: (Op. 4), Sonata in C minor, Mvt IV

Slur to c in A (→GE) & EE2, literal reading

Slur to next bar in A (contextual interpretation), FE & IE

No slur in EE1

..

When interpreted literally, the A slur reaches the last note in the bar. However, in the next bar, in a new line, the slur clearly shows that it should have been continued, which is also confirmed by the slurs in the similar situations in bars 126-127 and 128-130. This ambiguous notation was reproduced in GE and EE2 (in EE1 the slur was omitted). In FE and IE there is a continuous slur, in accordance with our interpretation.

category imprint: Graphic ambiguousness

issues: Inaccurate slurs in A , Uncertain slur continuation