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b. 65-66

composition: Op. 28 No. 17, Prelude in A♭ major

No slur in sources

Slur suggested by the editors

..

The missing slur must be Chopin's oversight related to the transition to a new page (b. 66 opens a new page in A). In the main text we suggest adding a slur after similar phrases.

category imprint: Editorial revisions

b. 65

composition: Op. 28 No. 17, Prelude in A♭ major

Staccato dot in A (→FC)

No mark in FE (→EE) & GE

..

The missing staccato dot in the editions resulted from carelessness of the engravers of FE (→EE) and GE.

category imprint: Differences between sources

issues: Errors in FE , Errors in GE

b. 65-90

composition: Op. 28 No. 17, Prelude in A♭ major

category imprint: Differences between sources; Corrections & alterations

b. 65

composition: Op. 28 No. 17, Prelude in A♭ major

..

In FCI the first e1-b1 fifth is not tied from the previous bar. It is the initial version or the copyist's oversight.

category imprint: Differences between sources; Corrections & alterations

b. 65-66

composition: Op. 28 No. 17, Prelude in A♭ major

..

In FCI the L.H. part in b. 65 clearly differs from the final version; however, it is important to mention that the interpretation of the 2nd and 3rd quavers is uncertain due to the poor quality of the photograph available to the mUltimate Chopin editors. The uncertainty concerns the pitch of the top notes, which we interpret as c1, since they are placed on a ledger line. However, we cannot rule out a possibility of them having been corrected, perhaps to b. The interpretation of the spots under the beam is also uncertain (one could see A noteheads in them). Such a placement of noteheads with respect to the beam is not used in a regular notation; however, it could have been created as a result of those notes having been added. On the other hand, they can also be smudges of the ink at the intersection of the stems and the beam.
In the 2nd half of the bar, there are 3 e-b-e1 chords in FCI. Small differences are also to be found in the R.H. – d1 is already on the 4th quaver in b. 65, while the bottom voice at the beginning of b. 66 is devoid of the c1 quaver.

category imprint: Graphic ambiguousness; Differences between sources; Corrections & alterations

issues: Accompaniment changes