I'd be very surprised if it is. My money would be on something to do with UPnP, which now appears to be working on the Pro following this latest update.
I have fairly jaded opinions when it comes to security software like Norton, and rarely put a lot of faith in what it's telling people.
Do you have any screenshots? Is there anything that expands/provides more detail on what it's actually grumbling about?
The BT/EE firmware is built on OpenWrt so that aspect isn't too concerning.
