Upgrading my testing site from 2.8.x to current MOODLE_29_STABLE branch I received following notice when upgrading database in "System" area
Undefined property: stdClass::$grade_minmaxtouse in Z:\home\moodle\www\lib\db\upgradelib.php on line 590
Should this be reported on the tracker? I'm afraid I can not recreate conditions of such upgrade...