PS 188.8.131.52 has been released on the MySymantec site. Once logged in with your MySymantec credentials, you can download the image and release notes from the PacketShaper S-Series software download page.
In addition to bug fixes, PS 184.108.40.206 contains keypad support for the LCD on the PacketShaper front panel. The keypad can be used to regain serial console access after PacketShaper enters a hung state. You can use this method as an alternative to generating the core dump using the serial console when the appliance is hung.