Issues : Errors in GE

b. 48

composition: Op. 11, Concerto in E minor, Mvt II

Long accent in FE (→EE,GE1GE2)

No mark in GE3

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The lack of accent in GE3 is undoubtedly a mistake.

category imprint: Differences between sources; Corrections & alterations

issues: Errors in GE

b. 49

composition: Op. 11, Concerto in E minor, Mvt II

Slur in FE (→EE) & GE3

No slur in GE1 (→GE2)

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The missing slur probably stems from inattention of the engraver of GE1, although it cannot be excluded that Chopin added this slur only in the last proofreading of FE (→EE).

category imprint: Differences between sources

issues: Errors in GE , GE revisions

b. 50

composition: Op. 11, Concerto in E minor, Mvt II

..

In GE1 (→GE2), the last tie of bis missing. It is a patent mistake, most probably an oversight. The mark was added in GE3.

category imprint: Differences between sources

issues: Errors in GE , GE revisions

b. 51

composition: Op. 11, Concerto in E minor, Mvt II

Slur from d2 in FE (probable reading→GE1GE2)

Slur from b2 in FE (possible reading→EE)

No slur in GE3

..

Just like in bar 50, the beginning of the slur in FE may be interpreted in two ways: falling over the first or the second demisemiquaver. However, in this case the placement of the mark rather suggests the latter.
In GE3, the slur was omitted, most probably by accident – see the note on the subsequent slurs. 

category imprint: Graphic ambiguousness; Differences between sources

issues: Errors in GE

b. 51

composition: Op. 11, Concerto in E minor, Mvt II

Slurs in FE (→EE,GE1GE2)

No slurs in GE3

..

GE3 does not have any slurs in this bar, which must be a mistake (we discuss the first slur separately). 

category imprint: Differences between sources

issues: Errors in GE