upgrade.php error in error_log

Good morning. First I want to thank the WordPress team for the incredible product. I hope you know that there are people in Georgetown Texas who would buy you lunch at Chuys or Saltgrass if you came to town.

Second, I’ve been noticing in the last couple days a line in my apache error logs that my server is trying to call a script called upgrade.php that it is looking for within the root folder of my MU install. I do not have the automatic upgrade plugin installed and I don’t have any users hitting the “upgrade” button within the admin section, so I’ve been starting to worry that there is something running on the server trying to run an upgrade script. Luckily, there is no upgrade.php file within the web root of the WP install, so this action has shown up in my error logs.

I am currently running 2.6.2 MU and when this error started I was running 2.6. This is installed on a RedHat server.

Has anyone encountered the same?

Thanks!