The article reads: "In the first (modern-day) Batman film, Batman's parents are murdered by the Joker. However, in the fifth modern-day film, Batman Begins, his parents are shown to be murdered by a street mugger."  However, I don't think Batman Begins should be considered a retcon.  It doesn't appear to be intended to be a part of the same continuity as the previous four movies, just as they aren't intended to be in continuity with the TV show, and the TV show isn't in continuity with the comics.
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