I think I recall some stories like this about Neuvation wheels, but don't recall details. It likely has something to do with the current lacing scheme and some combination of hub/spokes/etc being out-of-tolerance. Those Neuvations are lousy wheels, though, so I would suspect them as the culprit.

John Neugent, the Neuvation owner, will probably take care of the problem. That's his method: sells cheap and nasty wheels and just keeps on fixing and replacing them when they fail.