i don't know if they did either, bad. there was a case with Ozzy back in the 80s of hidden messages talking a kid into suicide, but when they anlyzed the recoring, it turned out to be a freak accident of the pitch of the guitars combining with the drums to create the sound and no one realized it.
But in the case of Zeppelin, i think it may have been intentional, but as a joke since at that time every band was being accused of doing similar things. It's possible that with all the recordings of Stairway that are out there, thwrong one got picked for the Early/Latter days set since that site made no mention of the original album (VI [4])
**EDIT** now that i've clicked on the new link, i'm wondering how this shit is possible and just how many of my cds have hidden messages
