Database errors when changing Calendar views

Problem/Motivation
I work for gbcacm.org,
a nonprofit group that uses an older version of Drupal
and wants to explore whether to use Open Outreach.

I downloaded version 7.x-1.0-beta8
onto a Mac running Snow Leopard
and MAMP (which provided MySQL).
I followed the installation videos
using a newly created database
and default values where they existed.

My goal was to create a proof of concept which showed a calendar
with both past and future events which were distinct from each other.

I clicked on Events to see the current month, created 3 events within
the current month, and then tried to change the Calendar view from
full month to week etc. I got database errors when I changed the view
something about problems with groupby.

Proposed resolution

Fix the problem so changing calendar views works.

Remaining tasks

Reproduce the problem.
Figure out why this does not work.
Fix it.

User interface changes

Depend on how problem is fixed.