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b. 1-2
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composition: Op. 10 No 4, Etude in C♯ minor
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In AI the slur does not embrace two entire bars, yet its shape and melodic context suggest that Chopin most probably had in mind such slur like in FE (→GE,EE). category imprint: Graphic ambiguousness; Differences between sources issues: Inaccurate slurs in A |
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b. 1
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composition: Op. 10 No 4, Etude in C♯ minor
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The crescendo indicated in this place most probably leads to category imprint: Differences between sources; Corrections & alterations |
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b. 1
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composition: Op. 10 No 5, Etude in G♭ major
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Both the verbal tempo indication and the metronome marking were added—undoubtedly by Chopin—during his proofreading of FE (→GE,EE). category imprint: Differences between sources; Corrections & alterations issues: Authentic corrections of FE |
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b. 1-6
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composition: Op. 10 No 8, Etude in F major category imprint: Graphic ambiguousness; Differences between sources issues: Errors in FE |
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b. 1
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composition: Op. 25 No 1, Etude in A♭ major
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Lack of upbeat in AI is characteristic for the original versions – cf., e.g., the autograph of the first edition of the Mazurka in A category imprint: Differences between sources; Corrections & alterations issues: Main-line changes , Changed phrase length |
in bar 4, also added only at the time of preparing the Etude for publication – most probably in [A]. 
major, Op. 7 No. 4 or the album autograph of the initial theme of the Nocturne in F minor, Op. 55 No. 1.