Eric,
You're very welcome.
The .htaccess file in the wp-includes folder does contain
<Files *.php>
deny from all
</Files>
<Files wp-tinymce.php>
allow from all
</Files>We have already heard back from Installatron and they are currently working on a fix which has been promised to us by end of day. As soon as it's available we'll make sure we update all of our servers right away.
As for existing installs I'm not too sure as I believe the wordpress version itself will be the same so an auto-update will not occur. However, we will get the details on the fix and pass them along so existing customers that need Multi-site can be fixed.
Thanks!
--
Ben Gabler
Senior Product Manager, Hosting @ Go Daddy