Before the recent update, the Upcoming Events widget in the sidebar said “There are no upcoming events at this time.” but there is at least one for every second Tuesday in a month. See http://events.stcwdc.org/ and the standalone calendar at http://events.stcwdc.org/events/ (sidebar is below the calendar).
After the update to 3.10.1, the Upcoming Events widget still says “There are no upcoming events at this time.”
I am using a Twentyeleven Child theme. There is no change to the message if I revert to the Twentyeleven theme or turn off other plugins.