I have Cisco IP Communicator, latest release from Cisco (8.6.6.16). It works fine with View Agent 7.5.4. I tried upgrade the Agent to 7.10.1, and at first it's fine. However, the longer it runs the more delay there is between when I should hear audio and when it plays. If I close Cisco IP Communicator and open it again, then it repeats the process. It takes about 15 minutes for the delay to show up.
Desktop is running Windows 10.