 It is only the second time (the first being "Play Dead") that an instrumental of a Björk track has been officially released.With this release, it was determined that "Earth Intruders" would have no physical release in any territory worldwide.Also, the Mark Stent mix was initially labelled as an "Extended Edit", but on May 23, 2007, was retitled to "Radio Edit"; the "xxxChange Mix" was retitled from the previous non-descriptive title "Earth Intruders Remix".