Norton Blocking My Own Computer

I recently upgraded to AV 2012 a week or so ago. One web site that I visit from time to time runs a featuredcontent slider from DynamicDrive. Today, when I checked the web site (and I can't remember if this is the first time since I upgraded) the featuredcontent slider doesn't load and Norton gives a message that it has blocked an intrusion from my own computer.

 

I also recently upgraded to Firefox 13.01, but this happens on IE 8 as well. (WinXP Pro.)

 

Is this a problem with the settings I have for Norton AV? How can I determine where the problem lies? If it is the way I have Norton setup, what is the safest way to fix it?

 

TIA.

 

Jon