Wikipedia is considered to be a strategic goal for the Wikimedia Foundation. When the traffic numbers fall to their lowest since August 2008, things are seriously wrong.
The good news is, the traffic numbers are seriously wrong; the page view aggregators were broken for a few days and this explains a lot.
When you look at the statistics, you will find that the last two months were not as good as the same months in 2009. This is however not the steep decline that is expected by the current trend in the monthly statistics. I hope and expect that the numbers will be corrected so that the anomaly of malfunctioning aggregators will not affect future comparisons.