I guess it's not a "bug", but I noticed that after applying the locking framework patch (which may end up in Drupal core),
after authenticated user logs out and cache is cleared, on next access the following error is returned Fatal error: Call to undefined function lock_acquire() in /var/www/drupal/modules/locale/locale.module on line 348
The error goes away by disabling Securesite (or reverting the patch)