A specific issue with ACR 9.x on CS6 for Windows involves "Droplets" (executable drag-and-drop batching scripts). If the user attempts to use a droplet created in CS6 with ACR 9.1.1 installed, the droplet may fail to launch or process files. This was never patched for CS6. Users requiring droplet functionality may need to downgrade to ACR 8.7.1.