Thanks for the update. Unfortunately, it stopped my forum working. After upgrading from 2.0.13, every request failed with a "Function name must be a string..." error message on this line in the reloadSettings function in Load.php:
$request = $smcFunc['db_query']('', '
SELECT variable, value
FROM {db_prefix}settings',
array(
)
);
The problem seems to be caused by the new SMF_DB_MySQLi class, which is setting db_query to an array instead of a string. I have disabled that class in smf_db_initiate for now, and the forum is working again.
I'm running Centos 6 with its default PHP 5.3.3. Perhaps the new SMF_DB_MySQLi class's smcFunc settings require a higher PHP version?