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b. 550-554

composition: Op. 11, Concerto in E minor, Mvt I

3 arpeggio signs in FE (→EE)

No signs in GE

..

In the entire fragment (bars 550-556), GE is devoid of arpeggio marks, in spite of the fact that in FE (→EE) arpeggios are featured in 3 places – before the 1st chord in bar 550 and 553 and before the minim in bar 554. The excessive length of marks, which consist of six and not four parts, like the majority of arpeggios in the Concerto (e.g. in bars 570 and 572 placed on the same page in FE), seems to indicate the fact that the wavy lines were added in the last phase of proofreading of FE as the reason for the absence of marks in GE

category imprint: Differences between sources

issues: Authentic corrections of FE

b. 550

composition: Op. 31, Scherzo in B♭ minor

C in A (→FCGE, →FEEE)

C in FESf

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The flats added in FESf could not have been written by Chopin, since the copy of FESf comes from an impression released sometime after his death. According to us, the variant entered into FESf may be, however, authentic: the pupil could have written down a change indicated by Chopin in a copy he purchased later.
A stylistic analysis leads to the conclusion that Chopin could definitely have suggested such a variant, since he would willingly use a Neapolitan chord; moreover, in this specific place, the C major chord is an exact equivalent of the G major chord from b. 546, so the version of the progression in FESf sounds as naturally as the version of the remaining sources. 

category imprint: Differences between sources

issues: Annotations in teaching copies , Annotations in FESf

b. 551

composition: Op. 39, Scherzo in C♯ minor

..

In FE the double sharp is mistakenly placed before h1.

category imprint: Source & stylistic information

issues: Errors in FE

b. 551

composition: Op. 11, Concerto in E minor, Mvt I

No mark in FE (→GE,EE)

Accent on g2 suggested by the editors

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In the main text, we add an accent over the 1st semiquaver after bar 196.

category imprint: Editorial revisions

b. 551-552

composition: Op. 11, Concerto in E minor, Mvt I

Fingering written into FEH

No fingering in FE (→GE)

Fontana's fingering in EE

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The authenticity of these concerted indications is not confirmed, yet, according to us, it is highly likely that it is a Chopinesque fingering.

category imprint: Differences between sources

issues: Annotations in teaching copies , EE revisions , Annotations in FEH