The pop up appears on every page, perhaps you could get it to just show once per visit. Now I am sorry but I am going to annoy you. Please explain to me how you can say norton is malfunctioning when it was fine until you added the new code. I also think that it is very unfair to make some less experienced users think that their security software is malfunctioning when it is quite satisfactory. I understand how sometimes things we want to code in our pages can trigger these reactions, especially nowadays with javascript activex etc. I also understand how your code is benign and for the host an important part of the site, but, causing inexperienced users to dabble in what they may now believe is a faulty piece of software is I think at least a little reckless. I know we always want to stomp our feet and say our side of the street is clean but I think the warning at least could say that ther is an incompatability with Norton and the new site and can be easily solved by following your instructions. Less dramatic and seems a little more likely than the other option. If you wanted the navigation buttons to be available even with Norton in its present mode it would be very easy to code. That is how you had it before, I would not expect that as I am quite happy to pay for my viewing by seeing the ads, I think everyone else should too. It is just your statement that Norton is " playing havoc" and "malfunctioning" is extreme at the very least.
Good Luck
Paul