After upgrading my multi-site installation to 3.6 all links to images in the media library have broken. I was previously using 3.5.2 with no problems, and have had to restore my site (http://www.edutronic.net) to that version.
In 3.6, the images do not show on the site, nor in the dashboard media library, nor do they display if I use the direct URL to the image.
As part of the troubleshooting I disabled all plug-ins, but this did not fix the fault.
Has anyone else had this issue and found a solution?