I did a clean install of V8 over my existing V7. It changed the appearance of several web pages I often look at including BT Yahoo and Windows Hotmail sign-in pages. But the big problem is that the PC would not let me change users or shut down - it gets stuck at the "Saving Your Settings" stage. I tried several times but had to use the power switch every time.
I've now completely uninstalled V8 and put back the V7 (luckily I kept the installation file) and all the problems have gone.
If someone can advise of a guaranteed fix maybe I'll try V8 again, otherwise I'll stick with V7.
Operating System:Windows XP Home Edition
Product Name:ZoneAlarm Internet Security Suite