Another “Oops” moment [link]

http://​​www.thebigquestions.com/​​2011/​​10/​​04/​​big-news/​​

Steven Landsburg notes that mathematician Edward Nelson has retracted his claim that the axioms of Peano Arithmetic are inconsistent.

The bit Landsburg cites indicates that the retraction was cordial and drama-free, the way a retraction should be—even a retraction of a claim as momentous as this one.

Now, is this kind of event more common in math than in other fields? Is it more common now than before? (Landsburg seems to attribute it in part to the existence of the Internet.) Your thoughts?