The issue is related to security plugins and the new support for HiDPI (Retina) images. These links Connections uses to create, cache and serve these images on demand on devices that support HiDPI images are being blocked blocked by security plugins.
Do you have any of the following plugins installed?
- iThemes Security
- All in One Security and Firewall
- BulletProof Security
If you do…
- For iThemes Security, disable the Filter Suspicious Query Strings in the URL.
- For All in One Security and Firewall disable the option to use a custom admin URL.
- For BulletProof Security … not exactly sure why that plugin is blocking the URL/s yet.
Not sure what I have to do to convince the links are safe … I may end up having to remove this awesome new feature.
Hope this helps!