[EventCalendar] Full-page calendar not showing next/previous month's events

[Bertha]

Hi there!  I'm new, so first off let me just say thanks to Alex for this 
wonderful plugin.  It was just what I wanted for a site I'm putting 
together.

Now the plea for help you all knew was coming... I've got a full-page 
event calendar at <http://raleighracers.org/calendar/>.  The current month 
is just fine, but if you page to later months, the squares are 
blank--although the date numbers are still hyperlinked, and will take you 
to that day's events if you select them.

If you page to earlier months, the events don't show up at all, although 
that's not as important.

Has anyone else encountered this problem?  I feel like there's something 
really obvious I'm overlooking here.

Thanks for any help or suggestions you can offer!

-Bertha
-- 
Hey Santa, how much for your list of naughty boys?