A number of people have noted a problem with the page view stats here, starting September 27 or so:
http://stats.wikimedia.org/EN/TablesPageViewsMonthly.htm
Several people at WMF are investigating. This is our public tracking area for this.
Version: unspecified
Severity: enhancement
URL: http://lists.wikimedia.org/pipermail/foundation-l/2010-October/061631.html