I have seen this behavior on IE, and it comes from exactly what Just_Ben said. If IE can't resolve the address, it automatically does a search for it.
Onna, Avoid Firefox! It's like a drug. Once you use it, you can't stop. And once you've tried it, you are forced against your will by a secret underground group called the Mozilla Mafia which threatens to kill your family unless you promote Firefox to everyone you know.
My dad was pretty adamant about staying on IE for a while too. Then I installed Firefox for him and showed him how you could shut off all of the flash ad animations and other ads, and how Firefox worked faster, was unaffected by all the security problems (or features, as Microsoft likes to call them) and so on. Now he too is addicted to Firefox. And that ended up being a gateway program to another one called Thunderbird, which he's been raving about now.
So heed the warning. oh no! They're coming to get me! AAaiaiiiiiiiii







