if, like me, you're unlucky enough to have bagged yourself a S7 first box set with the wrong bloody episode (Potential instead of Showtime) at the end of it, you have two options open to you. The following information comes straight from the BBC website, http://www.bbc.co.uk/cult/news/buffy/2003/07/17/5782.shtml
"A small batch of the Buffy 7.1 box set were mistakenly sent out with the episode Potential (which will be on set 7.2) rather than the correct episode, Showtime.
But fear not, we've been in contact with Fox who have come up with a solution.
If you're one of the unlucky ones, you should send the tape that has the wrong episode on only, with your name and address, to the Fox Freepost address:
Buffy 7.1 - VHS
On receipt into the Fox office, these will be collated every couple of days and sent onto the manufacturers, who will re-send the correct tape to the customer.
The missing episode Showtime will be also added as an extra episode on Buffy Season 7.2 VHS box set that will be released on 8th September, so you could just wait until then."
-- I doubt Freepost will mean anything to the good but dim-witted people at my local post office, but I doubt I can wait until Sept before I can get my hands on Showtime...or maybe I can. I just found out they'll resume airing BtVS S7 in Holland on Aug 3rd.