One thing I find irritating about IE11 is that, on some sites (but not this one!), the scroll bar disappears after a few seconds. When viewing a long page, I tend to keep the mouse pointer on the "down arrow" at the bottom of the scroll bar, then just press the button whenever I need to scroll down. Now I have to move the pointer then, when the scroll bar reappears, move it back to the arrow.
Is there any way to stop this happening?