Correction to "all regular Landsberg metrics are Berwald"

Just recently, incompleteness in the proof of the theorem appearing in the title [published in Szabó (Ann Glob Anal Geom, to appear, 2008)] has been discovered. Without this problematic part, the theorem is established only in the following restricted form: "A regular Finsler metric is Berwald if and only if it satisfies the dual Landsberg condition." The incompleteness appears in proving that the original Landsberg condition implies the dual one. © 2008 Springer Science+Business Media B.V.