I have been trying Prevx with the new Kaspersky Internet Security 2011 for the last few days. So far all looks good. . The only thing that doesn't work is the Saferun/Sandbox (where PSO doesn't seem to work) and the online banking protection in KIS2011. Is anyone else using this conbination and is it supported by Prevx.
It should be supported in all cases except for the sandbox as you've discovered. The sandboxed/limited mode will prevent the Prevx components that exist within the browser from telling the rest of the Prevx protection what the current URL/protection state is (the same issue that Sandboxie has with SafeOnline) so for now you'll probably not be able to have SafeOnline running in a sandboxed browser but everything else should work fine