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Pitch

b. 277-278

composition: Op. 39, Scherzo in C♯ minor

c2 in EE, FE & GE2

e2 in GC (→GE1)

..

The GC (→GE1) version, although harmonically and pianistically quite possible, is probably erroneous.

category imprint: Differences between sources

issues: Terzverschreibung error , Errors of GC

b. 278-279

composition: Op. 39, Scherzo in C♯ minor

New slur in EE and GC

One slur in FE and GE

..

Both versions of the slurring may be authentic, and the version of FE is probably later. However, the fact that GE - the source that was, after all, based on GC - has a continuous slur shows how easy it was for the engraver of FE to misread the manuscript. Bearing that in mind, we take the slurs of EE and GC as our main text. The practical difference in performance is very slight anyway. 

category imprint: Differences between sources

b. 281

composition: Op. 39, Scherzo in C♯ minor

..

EE does not have the treble clef in this bar, which is an obvious error. The correct clef in placed in bar 283 that opens a new line of text. 

category imprint: Differences between sources

issues: Errors in EE

b. 282-284

composition: Op. 39, Scherzo in C♯ minor

..

In bars 282 and 284 we add cautionary  before d3 and d2. Chopin did not enter the relevant   before d1 until bar 286.

category imprint: Editorial revisions; Source & stylistic information

issues: Cautionary accidentals

b. 282-283

composition: Op. 39, Scherzo in C♯ minor

No all'ottava sign in EE, GC (→GE) & FE2

All'ottava sign continued in FE1

..

In FE1 the octave sign ends as late as bar 283. The error was corrected in FEJ and FES, and also in FE2.

category imprint: Differences between sources

issues: Annotations in teaching copies , Errors in FE , Annotations in FES , Annotations in FEJ