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b. 5-13

composition: Op. 30 No. 1, Mazurka in C minor

 in FC (→GE)

No indications in FE (→EE)

in b. 5 in FES

..

The contrasting dynamic indications in bars 5, 9 and 13 were most probably added to FC by Chopin, as were many other markings (e.g. dynamic hairpins or accents). However, one has to emphasise that these marks, although their shape is the same as of some undoubtedly Chopinesque ones (e.g.  in the autograph of the Scherzo in B minor, Op. 31, bar 25,  in the autograph of the Etude in A, Op. 25 No. 1, bars 9 and 22,  in the autograph of the Etude in F minor, Op. 10 No. 9, bars 29 and 33 or in the later autograph of the Polonaise-Fantaisie, Op. 61, bar 1), are also very similar to the Fontana ones. The fact that they could have been written in Chopin's hand is indicated by, e.g. their more delicate, as if pale notation – cf. the analogous markings in the Mazurka in B minor no. 2, written certainly by Fontana.
In bar 5  was added in FES, which, to a certain extent, confirms Chopin's intention to contrast the particular theme phrases, dynamically and probably also expressively.
See also bars 37-45. 

category imprint: Differences between sources

issues: Annotations in teaching copies , Annotations in FES , Authentic corrections of FC

b. 5-8

composition: Op. 30 No. 4, Mazurka in C# minor

Pedalling in FC (→GE)

in b. 5 in FE (→EE)

..

In FE the pedalling of these bars is indicated in general terms with a  mark at the beginning of the phrase. Initially, a similar situation was in FC, in which, however, Chopin specified this aspect of performance by adding the remaining markings.

category imprint: Differences between sources; Corrections & alterations

issues: No pedal release mark , Authentic corrections of FC

b. 5-6

composition: Op. 63 No. 2, Mazurka in F minor

 mark in FE (→EEW)

marks in GE

..

The separated  hairpin in GE is a revision facilitating the engraver's work. In Chopin's times, both versions of notation were often considered equivalent.

category imprint: Differences between sources

issues: GE revisions , Hairpins denoting continuation

b. 5-13

composition: Op. 30 No. 2, Mazurka in B minor

..

In bars 5 and 13, in the main text we add a cautionary  to G in the bass and to g1 in the R.H. The latter was also added in both bars in GE (added in crayon in FC) and in bar 5 also in EE.

category imprint: Differences between sources; Editorial revisions

issues: EE revisions , GE revisions , Foreign hand additions in manuscripts

b. 5

composition: Op. 63 No. 1, Mazurka in B major

 over f in AI & GE3

 under d1 in FE (→EE,GE1GE2)

..

In FE the mordent was placed under the d1-f1 third, which suggests that it concerns the bottom note, d1. It must be a mistake – cf. the text of AI and bars 13 and 73 – caused by a tendency to place marks, e.g. accents, staccato dots, slurs or certain ornaments ( and ) on the side of noteheads. In the case of ornaments and slurs, it can change their meaning, thus leading to a mistake, as is the case here (see also, e.g. the Polonaise in F minor, Op. 44, bar 10).
There is a similar situation in bars 7, 71 and 75.

category imprint: Differences between sources

issues: Placement of markings , GE revisions , FE revisions