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Removing the element being hovered prevents all future hoverenter #64
See http://jsfiddle.net/qAFSX/3/. Remove an element that is being hovered, and nothing will ever be hovered again.
An easy partial fix is to have the hover plugin bind to destroyed and mouseleave, although there is still some weird behavior if the element is detatch()ed, and if the element is not reattached, no hover events will trigger until it is.