I have a similar kind of issue, so sorry if I'll use your thread. I also have an extra ticket, for friday show. If somebody is interested to buy it. I'm selling it fairly cheap. Around 15 pounds and I won't charge for postage.
http://cgi.ebay.ie/Sonic-Youth-31-8-07-London-perfrorming-DN_W0QQitemZ150123919377QQihZ005QQcategoryZ91474QQ rdZ1QQcmdZViewItem