new hosts appearing between 2011-06-10_0500 and 2011-06-10_1000:
www.computerbase.de

hosts disappearing between 2011-06-10_0500 and 2011-06-10_1000:
www.epfl.ch
www.sch.gr
www.uni-muenchen.de
www.upm.es
www.wunderground.com