new hosts appearing between 2011-07-21_1500 and 2011-07-21_2000:
www.haxx.se
www.maxifoot.fr
www.ovh.co.uk
www.tsinghua.edu.cn

hosts disappearing between 2011-07-21_1500 and 2011-07-21_2000:
www.gamershell.com
www.handbrake.fr
www.jyb.cn
www.koreus.com