Select: 
Category
All
Graphic ambiguousness
Interpretations within context
Differences between sources
Editorial revisions
Corrections & alterations
Source & stylistic information
Notation
All
Pitch
Rhythm
Slurs
Articulation, Accents, Hairpins
Verbal indications
Pedalling
Fingering
Ornaments
Shorthand & other
Importance
All
Important
Main


b. 127

composition: Op. 24 No. 4, Mazurka in B♭ minor

..

The indication written in A as ritenuto was shortened to riten. in GE (→FEEE). In EE, the abbreviation was placed between the staves. 

category imprint: Differences between sources

issues: EE revisions , GE revisions

b. 127

composition: Op. 24 No. 4, Mazurka in B♭ minor

A probable long accent in A

A possible short accent in A (→GEFEEE)

..

The accent type that Chopin used in this bar is not obvious. There are more arguments, both graphic and musical, for the long accent option.  GE (→FEEE)  all have short accents.

category imprint: Differences between sources

issues: Long accents

b. 127

composition: Op. 38, Ballade in F major

Crotchet g1 in A (→FE,EE)

Quaver g1 in GC (→GE)

..

As in analogous bar 102, the rhythm in the upper voice of the R.H. has two versions in the sources. In the main text we present the version of GC (→GE). This time the correction is inaccurate – Chopin added a quaver flag to the g1 note but   forgot the rest, as a result of which the bar in the upper voice has only 5 quavers. The obvious mistake was corrected in GE.

category imprint: Interpretations within context; Differences between sources

issues: Errors resulting from corrections , GE revisions , Authentic corrections in GC

b. 127-128

composition: Op. 38, Ballade in F major

d1 tied in A (→FE,EE) & GE3

d1 repeated in GC (→GE1GE2)

..

The tie sustaining d1 over the bar-line was omitted in GC (GE1GE2) – the copyist might have taken it for deleted. It was only added in GE3.

category imprint: Differences between sources

issues: GE revisions , Errors of GC

b. 127-130

composition: Op. 64 No 3, Waltz in A♭ major

..

In A the bars are written briefly in the form of numbered bars, corresponding to bars 3-6, which are supposed to be repeated here.

category imprint: Source & stylistic information

issues: Abbreviated notation of A