Thread:Project:Support desk/Thumbnails creating but not showing

MediaWiki - 1.20.3 PHP - 5.4.9 (cgi-fcgi) MySQL - 5.5.30-log Windows Server 2003

Our wiki is for an internal resource and recently we moved it from one server to another, however since being moved thumbnails don't work. When an image is uploaded new thumbnails are successfully generated but they're never shown on pages - just broken image links - this is the same for existing thumbnails.

Looking in the source of the page, the src path of the thumbnail is correct, and following through to that folder in Windows does show that there is indeed a thumbnail there.

I've checked the permissions of the IIS services and they all have access to the folder it's running in, I've also upgraded to the latest version (it was 1.19 before) and the problem persists.

Full size images work without issue.