When Im at school and using school computers, i have to use has IE9. When I want to access my gmail, I type in "gmail" in the URL bar, and thus IE9 does a bing search. The page half loads (As in, loads just about every thing but the search results) and then opens my gmail, kinda like google's "i'm feeling lucky". My question is this: Why?

IE9 doesn't have the URL of gmail, as i can watch the bing search load, and then the url changes to gmail, and it only happens for Gmail, having tired with searching Google and Facebook in the same method.

The computer is running Windows 7 with Windows Aero disabled, and limited account privileges.

While its a cool thing, I would like to known what causes it to happen.

Thanks