* When we discover a bug, have Christopher write a test script that reproduces it and fails.
 * When the developers fix the bug, either JoAnn or Christopher re-run the test script and verify that it now passes.
   * "developers" could include an outsourced developer.  Just send them the failing test case(s) and tell them to make it work.
 * Over time, these scripts will grow more and more comprehensive.
 * Before we do any release, we run all test scripts on several clients' databases to prove that we haven't reintroduced any old bugs.