Taking into account the explicit harmonic change on the 3rd beat of bar 577, it seems highly unlikely that Chopin would have envisaged the entire bar performed with one pedal. Therefore, the 
mark is most probably placed inaccurately – the scheme from the previous bars was mechanically repeated. The suggestion given in the main text aims at correcting the inaccuracy in order to avoid an unjustified mix of harmonies. There is a similar situation in bar 585.
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category imprint: Editorial revisions
issues: Inaccuracies in FE
notation: Pedalling