<A target="_blank" href="http://www.thenewdominoadmin.com/blog/?p=2072&utm_source=feedburner&utm_medium=feed&utm_campaign=Feed%3A+TheNewDominoAdmin+%28The+New+Domino+Admin%29">Marc Champoux has posted some code you can use to scan mail files</A> on your clusters to find and fix quotas that aren't in sync.