$config['db']['adapter'] = 'pdo_mysql';
(1) XenForo_Install_Model_Upgrade::getLatestUpgradeVersionId() now returns a string (correct data type for fetchOne, according to the published API) instead of an integer; which breaks any version checking.
(2) Starting a nested transaction results in an sql error, sometimes. Happens just randomly. Couldn't find any pattern to it.
(3) The forumlist page works, though. And it consistently loads ~15% faster with pdo, than with mysqli.
Is it just me?
And what's the status of PDO_MySql in XenForo: fully supported?