== IMSLP #00374 No. 4 in Ab has several sheets swapped with No. 3 I think and is also missing one page
IMSLP #05860 has impromptu no. 3 in G major rather than G flat major
The following excerpt from the new (German) Deutsch catalog may make things clearer: The Impromptus op. 90 were edited as single pieces, numbered from 1 to 4. Only the first two appeared in Schubert's lifetime: in December 1827 (Tobias Haslinger, Vienna). Numbers 3 and 4 were printed 30 years later (Carl Haslinger, Vienna, 1857). The manuscript, from which the print was taken, has a note by Tobias Haslinger (Schubert's contemporary): "Im ganzen Takt und in G-dur um zu schreiben", which means, I think: "In simple (not double) Allabreve and to be transposed into G-major". Liszt referred to the original edition from 1857, the Breitkopf & Härtel Gesamtausgabe wanted to recreate Schubert's original intention. The question is: Tobias Haslinger may have had Schubert's o.k. for transposition, but is this really what he wanted at last? --Molinarius 00:29, 1 June 2011 (UTC)