Hi,
I have used .clone() to date always in the context of ui-draggable helpers etc, ie always on anonymous DOM elements. I today for the first time had occasion to duplicate a properly deep DOM structure, full of id'ed elements. I was surprised (not sure why) to find that .clone() faithfully clones every id. Therefore, after I inserted the clone into the DOM, the DOM had two ids of everything. Is this a problem? I retrieved the children I needed to target with $("no-longer-quite-so-unique-id",clone).
Thanks.