Rather than transfer the stench of diesel fuel from me to my laptop, I am using the communal Windows boxen which have the very annoying interface misfeature of changing focus to windows that just did something new, rather than keeping the focus in the window in which I am typing.
Furthermore, IE likes to shift focus in the same entry widget. I can start typing a URL in the location bar, but when IE handles an event, my insertion point ends up at the beginning of the entry rather than where I was typing before. I get URLs like orguse.perl.
Sadly, most people here seem to have only used Windows, and just deal with it because that's the way computers are.