Borodin: Second Symphony
The full score of Borodin's Second Symphony was published posthumously. A simple comparison of this score edited by Rimsky-Korsakov and Glazunov with both autograph sources and the lifetime edition of the 4 hands arrangement (1876) exposes plenty of discrepancies. Some episodes were completely rewrited by the two editors.
The edition of the original version
could be ordered here:
For the detailed account see my article (in Russian): http://sias.ru/publications/magazines/musik/2014-10-11/articles/3495.html
For some examples (score fragments) see another article: http://gnesinstudy.ru/?p=137