ScrollSpy not acurate unless element has position: relative

Created by: kennethjevans

I just noticed that Scroll Spy miscalculates the offsets for its targets unless the element the scrollspy is on has its position set to relative.

This isn't a huge deal, but it isn't documented at all. Could we please get the documentation updated?

Thank you.

In case I'm crazy, I've setup a jsFiddle to demonstrate. I'm seeing this behavior in Windows 8 on FF 26, Chrome 32, and IE 10.