Nothing indicates that the ties sustaining the b1 crotchets in bars 65-66 and 73-74 could have come from Chopin. Theoretically, they could have been added by Fontana, who could perhaps recall Chopin's performances; this possibility allows for qualifying this version as, at most, a variant of questionable authenticity. If the composer wanted to sustain these notes, it would be difficult to explain why he did not mark it while writing Atut, proofreading FE (at least twice) or listening to pupils' performances.
The reviser of EE could have remained under the influence of the tie in bars 234-235; however, in that case the theme's melody is developed in a variational manner to a significant extent, so that moving such a detail from one version to another is out of the question (cf. the explicit repetition of the note in bars 226-227).
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category imprint: Differences between sources
issues: EE revisions
notation: Rhythm