new hosts appearing between 2011-09-21_1000 and 2011-09-21_1500:
www.fotopedia.com
www.gratka.pl
www.nccu.edu.tw
www.tech4on.com
www.wireshark.org

hosts disappearing between 2011-09-21_1000 and 2011-09-21_1500:
www.justice.cz
www.sch.gr
www.uv.es