OK, yes...that completely borked Safari for me as well. It hung my entire system...I was just about to a hard reboot when it unfroze for me.
I'm not sure I'd call something that was featured on QVC a "reputable" product.
They appear to be using MegaCount, a hit counter that deploys all sorts of adware/spyware, etc. I'm glad I was on a Mac when I went there.