Not too mysterious. Many large corporations have invested $x million in proprietary software where the cost is amortized by the beancounters over a number of ye

Not too mysterious. Many large corporations have invested $x million in proprietary software where the cost is amortized by the beancounters over a number of years. Some of this proprietary software was written in ActiveX, VBscript or some other technology that means that the vendor only officially supports it operating under IE6. It might run fine under newer IE versions or other browsers, but doing so would void the support contract with the vendor (which means huge costs). So the choice is either to spend millions more upgrading it (when it works perfectly fine for business purposes already), or keep everyone on IE6. Most stick with IE6. It's getting better as the cost of the software gets fully amortized and planned replacement projects start going ahead - but there's still holdouts. I work with a 50,000+ employee corporation that just got the go-ahead to upgrade employee workstations to IE8 - with the exception of a few departments (x,000 workstations) who are stuck with one of the aforementioned proprietary apps that's more expensive to upgrade than it is to support the users with the crappy browser.