Issues : Omission of current key accidentals

b. 14

composition: Op. 10 No 4, Etude in C♯ minor

..

In AI there is no  lowering d1 to d1, which is a patent error.

category imprint: Interpretations within context; Differences between sources

issues: Omission of current key accidentals

b. 29

composition: Op. 10 No 4, Etude in C♯ minor

..

The fact that Chopin heard the E minor key in this bar (and subsequent) is revealed by the lack of  lowering g1 to gin AI and at the same time by the presence of a  of g2 in the 2nd half of the bar.

category imprint: Interpretations within context; Differences between sources

issues: Omission of current key accidentals

b. 41

composition: Op. 10 No 4, Etude in C♯ minor

..

In AI Chopin overlooked the  before the last semiquaver (A).

category imprint: Differences between sources

issues: Accidentals in different octaves , Omission of current key accidentals , Errors of A