One thing that has bothered me tremendously since Windows 95 (I think that was the first time I've noticed it) is how Windows automatically selects an entire word for you when you're selecting text with the mouse.  It seems to be worse for certain apps than others, but I'm pretty sure it's a universal Windows behavior.

Will this behavior remain in Longhorn?  Will there at least be a way to disable this "feature" (Control Panel, regedit, etc.)?