PS 11.9.1 has been released on the Symantec Support download site. Once logged in with your MySymantec credentials, you can download the image and release notes from the PacketShaper S-Series download page.
PS 11.9.1 contains the following new features:
On-Box Traffic Assessment Reports: PacketShaper includes a new reporting engine that offers enhanced and expanded reporting capabilities.
CAPWAP classification: A new service was added to classify CAPWAP (Control and Provisioning of Wireless Access Points) control and data traffic.
In addition, PS 11.9.1 fixed a number of bugs and addressed Common Vulnerabilities and Exposures (CVEs).