Comment 28 for bug 422511

Please see my comments in bug 525224.

I'll quote the important usability comment:

"There's a reason the Back button doesn't have an unclickable area to the left.
It allows you to hammer your mouse over to the left of the screen and be sure
you're hitting the Back button.

The same usability principles apply everywhere. If you take a look at various
themes (charamel, [silvermel]) you'll notice the vertical scroll bar does not has an unclickable/unscrollable border to it. You can hammer your mouse over to the right and be sure you're able to scroll. Who would want to target their mouse to a specific ~20px region?"

(linux, x86_64, firefox 3.5.4, stock theme)