Issues : Errors repeated in EE

b. 6

composition: Op. 50 No. 3, Mazurka in C♯ minor

..

Both autographs are lacking in the  raising a1 to a1. The mistake is also in EE, where it was repeated after the proof copy of FE. In the very FE Chopin added the overlooked accidental; the correct text is also in GE.

category imprint: Interpretations within context; Differences between sources

issues: Errors of A , Authentic corrections of FE , Last key signature sign , Errors repeated in EE

b. 94-96

composition: Op. 50 No. 3, Mazurka in C♯ minor

..

AI and AF (→FEEE) are lacking in the sharps restoring f2 at the end of b. 94 and f1 at the end of b. 96, as a result of which it is only GE that contain the correct text – cf. b. 2 and 4, which Chopin wrote without mistakes in both Stichvorlage autographs.

category imprint: Interpretations within context; Differences between sources

issues: Omissions to cancel alteration , Errors repeated in FE , Errors repeated in EE

b. 134

composition: Op. 50 No. 3, Mazurka in C♯ minor

G without slur in AF

Rest in GE

G with slur in FE (→EE)

..

It is difficult to say which version of the 1st beat of the bar is later and whether Chopin considered any of them to be final. According to us, when the G bass note is played, it distorts the rhythmic scheme of this phrase, in which the accented quaver triplet, which is the local climax, is exposed against the L.H. rest. Chopin could have inserted this crotchet to compensate its absence in the previous bar – cf. b. 9 and 101 – later, however, in [AG] (→GE) he considered keeping the phrase's rhythm to be more important.
A similar issue can also be found in b. 139.

In FE (→EE) this G note is the starting point of a slur, which is a mistake. Moreover, the bass clef was not reintroduced here in AF (→FEEE), which is Chopin's patent mistake.

category imprint: Differences between sources; Corrections & alterations

issues: Errors of A , Accompaniment changes , Errors repeated in FE , Errors repeated in EE

b. 134-135

composition: Op. 50 No. 3, Mazurka in C♯ minor

..

In FE (→EE) the slur over the L.H. part starts already from the 1st crotchet in b. 134. It must be a result of misinterpretation of the notation of AF, in which the slur over the three chords encompasses them with plenty of margin. Moreover, in FE this slur reaches only the 3rd crotchet in b. 134, in spite of the fact that its ending is present in b. 135 – on a new line.
This inaccuracy was repeated in EE. See the previous note concerning the 1st beat of the bar.  

category imprint: Graphic ambiguousness; Differences between sources

issues: Inaccuracies in FE , Uncertain slur continuation , Errors repeated in EE