the Periods utility fails with this error when trying to save the first period. It also seem to carry a default display of 50 minutes in the length column.
DB Execute Failed.
SQL: UPDATE SCHOOL_PERIODS SET START_HOUR=NULL,START_MINUTE=NULL,START_M=NULL,END_HOUR=NULL,END_MINUTE=NULL,END_M=NULL WHERE PERIOD_ID='2'
Traceback: /srv/www/opensis/modules/School_Setup/Periods.php at 110
Additional Information: Unknown column 'START_HOUR' in 'field list'