Norton Safe Web

I have Norton Safe Web enabled in my new NIS 2012.  I notice that instead of the legible circular green "OK" against web search results I now have an extremely small green speck with what appears  to be black letters "btz" next to it but so small as to be almost illegible. I can't see this as an improvement.  On the plus side as you run your cursor over it a big "OK" box comes up as before.  What was wrong with the larger green circular "OK" and what is "btz" all about?  Any ideas?