Doesn't work on Multisite?

It seems part of the problem is ms-files.php, which my WPMS is still using (since I launched my Multisite before WordPress 3.5).

Thus, I found this post that describes and offers a plugin to migrate away from the archaic ms-files.php: https://www.yunomie.com/2298/removing-ms-files-php-after-upgrading-an-existing-multisite-installation-to-3-5/

Sure enough, it’s a problem with ms-files.php. Thus, it seems the best solution for me is to migrate my site away from ms-files.php. That’ll take some work, but overall probably worth it.

Yup. That was exactly the problem. ms-files.php on WordPress multisite doesn’t properly handle the mime type for svg. Thus, moving away from ms-files.php fixed it for me.

I also used this: https://halfelf.org/2012/dumping-ms-files/

Hi Daniel,

Thanks for your support.
I’m glad you got it sorted so quickly and thank you for posting your solutions to help others.

Cheers
Ben