ExampleExamples of a alternative editorial handlingdecisions: C.M. von Weber, Piano Sonata n.2 in Ab Major, Op.39, 8th m.8 measures from end of last movement: Paris ed. ca. 1868; Peters ed.; Liszt ed. (all from IMSLP)
The Paris edition alerts the pianist, who must choose the hand; the Peters gives no "heads-up" that the same note is in both parts; and Liszt assigns the note to one part only (using a rest instead of a zero fingering).