Does it say "info icon" or has that come with your when copyng & pasting? It looks like this, right? http://www.getnetgoing.com/Internet-Explorer-The-webpage-cannot-be-displayed.png
I get that a lot at work recently. I often end up closing EI (and then it closes EVERY tab and IE window) and reopening it. I suspect it might be to do with some ads not being approved of; maybe ?
Only happens on AB, v annoying. I blamed flashing adverts yesterday but they are not there now. Happend to me twice today within the last hour. (BT & IE)