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b. 151

composition: Op. 44, Polonaise in F♯ minor

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There is no cautionary  to f2 before the 1st R.H. quaver in FE (→EE1) and GE. In this context it is a patent inaccuracy (probably by Chopin) – two cautionary accidentals are present in all sources both 2 bars further and in the first phrase of this section, in b. 131, 133 and 135. The accidental was added in EE2 (→EE3).
Moreover, in FE (→EE1) there is no  raising d2 to d2. The mistake was corrected in EE2 (→EE3).

category imprint: Differences between sources

issues: EE revisions , Errors in FE , Inaccuracies in FE , Cautionary accidentals

b. 151

composition: Op. 23, Ballade in G minor

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The cautionary naturals before the 1st L.H. octave were added by FE (→GE,EE). It is uncertain whether it was performed by Chopin. In the main text we also add an accidental to a1 in the R.H.

category imprint: Differences between sources; Editorial revisions

issues: Cautionary accidentals , Authentic corrections of FE , FE revisions

b. 152

composition: Op. 43, Tarantella

 
 
..

In EE the chord on the second beat in the LH part is a dotted crotchet, while in other sources we find a crotchet and a quaver rest.

category imprint: Differences between sources

issues: EE revisions

b. 152-155

composition: Op. 43, Tarantella

 
 
 
..

In sources bars 152-155 are slurred differently. We see differences mainly in the first half of the phrase.

Given it is a grace notes phrase we may assume GE to be the copyist's arbitrary interpretation.

Similarly, EE version with a slur beginning in the middle of b. 154 also seems little probable. 

category imprint: Differences between sources

issues: EE revisions , GE revisions

b. 152-154

composition: Op. 39, Scherzo in C♯ minor

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The manner in which the indication rallentando is written is slightly different in different sources. EE has the abbreviation rallent. broken into syllables, which is an arbitrary manner typical for that edition. In FE, the abbreviation rall. was used, and in GE the dashes delimiting its scope were omitted. 

category imprint: Source & stylistic information

issues: EE revisions