Thanks Merlin, I know this is a comcast issue and you are just trying to help the log to not flood with the error. I have been in contact with the comcast v6 team and they say they are working on it but thats as far as it has ever got.
Just for reference, here's the thread where I took the workaround from:
http://forums.comcast.com/t5/Home-N...-Neighbour-table-overflow/td-p/1757119/page/3