Duplicate of BUG-000096309: We patched the hosted CDN version 3.8-3.16 on 3/26/16, so any applications using them should now be ok (minus browser cache issues).
There are still problems if not using the hosted CDN:
* ArcGIS Online Map Viewer (planned for fix)
* several other JavaScript applications on ArcGIS Online
* Downloaded the API
* Bower builds
* Web optimizer builds on jso.arcgis.com
* Presentations from ArcGIS Online
* WebAppBuilder apps from ArcGIS Online (standalone Web AppBuilder is fine)