Stats no longer working

For several days now, Wordrpress Stats and Google Analytics have only caught a handful of visits to my blog (there are usually 30-50 per day). I installed WassUp yesterday and it has caught over 200 visits. What is wrtong?

I deactivated and reactivated both plugins to no avail. I upgrade plugins whenever I see the notification on the Dashboard, but I do not remember which, if any, were upgraded over the weekend.

My blog is at http://www.timobrienphots.com There is a page on the site that lists all active plugins.