The current build (tgz) does not install, both 1.9.3 and 2.x (mysql): INSERT INTO mdl_role_context_levels (roleid,contextlevel) VALUES(NULL,10) 1048: Column 'roleid' cannot be null ADOConnection._Execute(INSERT INTO mdl_role_context_levels (roleid,contextlevel) VALUES(NULL,10)) % line 874, file: adodb.inc.php ADOConnection.Execute(INSERT INTO mdl_role_context_levels (roleid,contextlevel) VALUES(?,?), Array[2]) % line 271, file: adodb_moodle_database.php adodb_moodle_database.insert_record_raw(role_context_levels, Array[2], false, true) % line 178, file: mysqli_adodb_moodle_database.php mysqli_adodb_moodle_database.insert_record(role_context_levels, Object:stdClass, false, true) % line 4392, file: accesslib.php set_role_contextlevels(null, Array[1]) % line 1829, file: accesslib.php [[couldnotdeleterolecontextlevels]] There also seems to be an install issue with the current 1.9.3 cvs version, still testing...