The sessions were recorded at the wrong speed (too fast) and the problem was not identified and corrected until they found the safety copy of the master tape in the 1990's. The 1997 Columbia reissue features the corrected speed, as do the other reissues after that date. There have been many LP reissues, some of which feature versions of the album at both speeds.
In short, pick up something post-1997.
In short, pick up something post-1997.