Assuming that you are using IE 7 - have a look a the very top Box, i.e the one that displays the actual domain name of the site that you are visiting, e.g
http://www.pprune.org/forums/newreply and see if the result is actually what you are expecting. It's possible to spoof web pages, but as far as I know domain names are unique. Check you home page domain as well - Are you using a phishing filter ?. copy those domain names into google and see if anything comes up
CATIII-NDB.
Thanks
