If we make a search of siteviews for Basque Wikipedia in siteviews we get a very anomalous result for some days in December. It doesn't fit with any logical explanation (special events) or trend, and the most viewed articles also doesn't fit with the result. This result breaks some statistics we are tracking for real pageviews, in order to report for our projects.
Is there any possible explanation for this? Or is simply a bug?