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Rhythm

b. 80

composition: Op. 50 No. 1, Mazurka in G major

..

FE2 overlooked the semiquaver beam, as a result of which g2 looks like a quaver.

category imprint: Interpretations within context; Differences between sources

issues: Errors in FE

b. 84-85

composition: Op. 50 No. 1, Mazurka in G major

d tied in A1 & GE

repeated in FE (→EE)

..

The reason for the omission of the tie of d by FE (→EE) could have been the deletions of A1 at the beginning of b. 85. The fragment of the slur falling on that bar was deleted, and Chopin did not repeat that fragment on the rewritten – on a staff below – 1st beat of the bar. 

category imprint: Differences between sources

issues: Errors in FE , Errors resulting from corrections