Hi Matt
This new release breaks the block completely for me - it doesn't even appear and I get this error:

Debug info: SQLState: 42000<br>
Error Code: 156<br>
Message: [Microsoft][SQL Server Native Client 10.0][SQL Server]Incorrect syntax near the keyword 'WHERE'.<br>

SELECT DISTINCT(role.id)
FROM mdl_role role
INNER JOIN mdl_role_capabilities rc
WHERE rc.contextid = 1
AND rc.capability IN (N'mod/assignment:grade',N'mod/forum:viewhiddentimedposts',N'mod/quiz:grade',N'mod/workshop:editdimensions')

[array (
0 => 'mod/assignment:grade',
1 => 'mod/forum:viewhiddentimedposts',
2 => 'mod/quiz:grade',
3 => 'mod/workshop:editdimensions',
)]
Stack trace:
line 394 of \lib\dml\moodle_database.php: dml_read_exception thrown
line 252 of \lib\dml\sqlsrv_native_moodle_database.php: call to moodle_database->query_end()
line 368 of \lib\dml\sqlsrv_native_moodle_database.php: call to sqlsrv_native_moodle_database->query_end()
line 773 of \lib\dml\sqlsrv_native_moodle_database.php: call to sqlsrv_native_moodle_database->do_query()
line 807 of \lib\dml\sqlsrv_native_moodle_database.php: call to sqlsrv_native_moodle_database->get_recordset_sql()
line 61 of \blocks\ajax_marking\lib.php: call to sqlsrv_native_moodle_database->get_records_sql()
line 137 of \blocks\ajax_marking\lib.php: call to block_ajax_marking_teacherrole_sql()
line 72 of \blocks\ajax_marking\block_ajax_marking.php: call to block_ajax_marking_get_my_teacher_courses()
line 280 of \blocks\moodleblock.class.php: call to block_ajax_marking->get_content()
line 232 of \blocks\moodleblock.class.php: call to block_base->formatted_contents()
line 926 of \lib\blocklib.php: call to block_base->get_content_for_output()
line 978 of \lib\blocklib.php: call to block_manager->create_block_contents()
line 311 of \lib\blocklib.php: call to block_manager->ensure_content_created()
line 214 of \theme\decaf\renderers.php: call to block_manager->get_content_for_region()
line 148 of \my\index.php: call to theme_decaf_core_renderer->blocks_for_region()