new hosts appearing between 2011-08-20_0500 and 2011-08-20_1000:
www.chatvibes.com
www.lima-city.de
www.tsinghua.edu.cn

hosts disappearing between 2011-08-20_0500 and 2011-08-20_1000:
www.serversupportforum.de
www.uni-muenchen.de