Symphony no. 4 in E-flat major, WAB 104 "Romantische" (generic, use if unsure which edition to use)

The Bruckner Problem is a term that refers to the difficulties and complications resulting from the numerous contrasting versions and editions that exist for most of the symphonies. Bruckner scholars generally recognize three principal versions of the Fourth Symphony:
Version I: 1874
Version II: 1878–1886 (or, possibly, 1876–1886)
Version III: 1887–1888

At least seven authentic versions and revisions of the Fourth Symphony have been identified:
1874 version - Bruckner's original version, was never performed or published during the composer's lifetime.
1878 version - Bruckner thoroughly revised the first two movements and replaced the original finale with a new movement entitled Volksfest ("Popular Festival"). He also replaced the original Scherzo with a completely new movement, which is sometimes called the "Hunt" Scherzo (Jagd-Scherzo). Haas published an edition of this version, but it has never been recorded.
1880 version (aka 1878/1880) - This is the essentially the 1878 version with yet another a new finale. This was the version performed at the work's premiere on 20 February 1881.
1881 revision - The same as the 1880 version but includes some changes made after the first performance of the latter – notably a cut in the slow movement and a further reworking of the finale.
1886 revision - This is the same as the 1881 version but includes a number of changes made by Bruckner for a performance in New York City. This version was published in an edition by Nowak in 1953, but in the title of Nowak's publication, it was confusingly described as the "1878-1880 version".
1887 version - Bruckner thoroughly revised the symphony again with a view to having it published. This version was first performed to great acclaim in Vienna on 20 January 1888.
1888 revision - Bruckner made extensive revisions to all four movements after having heard the premiere of the 1887 version the previous month. The revised score was sent to the Viennese firm of Albert J. Gutmann, who published it in September 1889. This was the first edition of the symphony to be published in the composer's lifetime.