This page uses jQuery 1.4.4, demonstrating the context difference from v1.3.x.

Works using a selector string:

a paragraph


Fails using a DOM element, context gets in the way:

a paragraph


This has an effect on event handlers (mouse over the paragraph):

a paragraph


On jQuery 1.3.2, both of the "fails" cases above include the li elements via add; in jQuery 1.4.x, they don't, because the this.context is set to the DOM element passed in, which add then uses.