Well, sometimes the obvious just isn't...
BTW, The corporate use of old browsers apparently isn't uncommon- behind the scenes. Some old programs just don't take to the new features. Fire alarm systems for example. A friend who works for another multinational corporation says he sees this fairly regularly. Most folk aren't allowed to use it for such nefarious purposes as posting on this fine site, though! All blocked and internalized. We Morlocks in the shops never were denied access. In fact, quite the opposite, just as long as quality and productivity remain on an upward trend. I suspect IE6 is still running in our systems, somewhere...