Slider Handles overlapping

Slider Handles overlapping

Hello, am having an issue of the handles of a range slider overlapping.  Ideally they should function similarly to this:  http://developer.yahoo.com/yui/examples/slider/slider_dual_with_highlight.html

I found a bug referencing this issue but wasn't quite sure if the fix had been applied as part of the latest release:  http://dev.jqueryui.com/ticket/3467

There's mention of a "distance" option but using this with 1.8 slider ui does nothing.