How do I disable the re-arranging "feature" in the Windows 7 taskbar?

Windows 7 has a useless new feature where you can drag the taskbar bars to re-arrange them. The problem the creates is when I click on an icon on the Windows 7 taskbar, if I make the slightest movement to the right or left as I'm clicking it, it thinks I'm trying to re-arrange it rather than to activate the open program I clicked on. So, for example, if I *thought* I clicked on the third icon, I look at my screen and see this is a window I want closed, I right-click on the taskbar, select "close" - and the wrong program closes, because I didn't actually have that program activated (and they so nicely ruined the way it used to clearly show the selected taskbar as a sunken box). I see no need for these gimmicky features they've added - how can I disable the taskbar re-arranging-by-dragging feature so it doesn't impede functionality?