Multi-day events may display in an unexpected way.

The 12 July 2008 code sprint (and follow-up) changed the test for whether
an event occurs within a time range.  See  Issue178 .

  Old test:  Is the *start_time* within range?
  New test:  Is *any part of the event* within range?

The reason for the change is to improve handling of multi-day events.  

Consider OSCON, which starts July 21, ends July 25.

Under the old test, if you viewed the Calagator overview page on July 22,
23, 24, or 25, OSCON would not appear.
Under the new test, it will appear under Today's events, but display in an
unexpected way.  For instance on July 22, you will see a group of events
listed under "Today".  It will then list events that started earlier than
today, including their start times.  So it will look like this:

Today
  Monday          O'Reilly Open Source Convention
  Jul 21 2008     7:30am through Friday, July 25 at 2pm
                       Oregon Convention Center 

This is unexpected  because Today is July 22.  

This *not* a issue with *which* events are listed.  But it is an issue with
how the times are described on the Overview page.  There are similar issues
for the Browse Events page (and for the filtered events on that page).