Q:

Nested Sortable plugin consistently crashes browsers

Here's the fiddle: http://jsfiddle.net/scZtb/1/
Be warned, as the title suggests, this might crash your browser (or at least the tab, if you're in Chrome).
I'm trying to get this example to work. I've copied it almost exactly, so I don't know why it would work there, but not in my example.
Anyone know what I'm doing wrong?

A:

It seems to only work with <ol>s not <ul>s. I can't imagine why that is, but I can work with that.

