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b. 77-82

composition: Op. 49, Fantaisie in F minor

Semiquaver over L.H. quaver in A & FE

Semiquaver after L.H. quaver in GE & EE

..

Moving the semiquavers in bars 77-78 and 81-82 beyond the 3rd quaver of the respective L.H. triplet is an arbitrary change by the revisers of GE and EE (in bar 77 GE mistakenly placed the semiquaver before the 3rd L.H. quaver). It suggests that the semiquavers should be performed after the respective accompaniment note, which is certainly contrary to Chopin's intention, clearly stated in the A notation. Cf. bars 245-249, see also the Nocturne in C minor, Op. 27 No. 1.
Similarly, in analogous bars 164-169 and 244-249.

category imprint: Differences between sources

issues: EE revisions , GE revisions , Dotted rhythms and triplets

b. 77-78

composition: Op. 49, Fantaisie in F minor

Slur broken in b. 78 in A & GE2

Slurs overlapping in b. 78

Slur broken before b. 78 in FE (→EE)

Continuous slur, our alternative suggestion

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In the main text we provide the slurs of A, where the slur is divided in a pianistically natural place, that is over a rest. We consider the division of the slur between bars 77 and 78 in FE (→EE) to be an inaccuracy related to the transition to a new line; therefore, we suggest a continuous slur in this place as an alternative solution.
The GE1 slurs must be inaccurate, which was corrected in GE2

category imprint: Differences between sources; Editorial revisions

issues: Inaccuracies in GE , GE revisions

b. 77-81

composition: Op. 49, Fantaisie in F minor

Appoggiaturas in A

Acciaccaturas in FE (→EE) & GE

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The slashed grace notes in bar 77 and 81, which is inaccurate, were almost certainly written by Fontana in [FC] – slashed grace notes were part of Fontana's style as a copyist, which can be observed in the pieces in the case of which both the autograph and its copy are preserved, e.g. in the Preludes, Op. 28. Nevertheless, in the main text we give slashed grace notes, since it was in this form that Chopin wrote them in 4 remaining analogous places – bar 164, 168, 234 and 238. Generally, in obvious situations Chopin would often ignore whether grace notes were written precisely, allegedly writing long grace notes in places in which the context, like this one, determines the use of short grace notes.
The inaccurate notation was aptly revised in GE as well. 

category imprint: Differences between sources

issues: GE revisions , Notation of grace notes , Non-slashed grace notes

b. 77

composition: Op. 49, Fantaisie in F minor

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At the end of the bar the semiquaver beam was overlooked in GE1. The mistake was corrected in FE2 (→EE).

category imprint: Interpretations within context; Differences between sources

issues: Errors in FE , FE revisions

b. 78-82

composition: Op. 49, Fantaisie in F minor

b2(1) together with d3(2) in A & FE (→EE)

b2(1) before d3(2) in GE

..

Moving the last quaver in the bottom voice in bar 78 and 82 so that it is between the 2nd and 3rd notes of the triplet was an arbitrary decision by the reviser of GE. The A notation, both in these bars and in two repetitions of this phrase in different keys (bars 165-169 and 245-249) leaves no doubts about the synchronisation of both R.H. voices – their last notes are to be performed together regardless of the rhythmic value in a given voice. We can observe this kind of notation numerous times in other pieces by Chopin, cf., e.g. the Nocturne in C minor, Op. 48 No. 1, bars 61-63, the Ballade in F minor, Op. 52, bars 217-219 or the Prelude in E, Op. 28 No. 9, bar 8.
See also bar 80. 

category imprint: Differences between sources

issues: GE revisions