Update on an old thread: [
webmasterworld.com...]
/search_engine_spiders/3696307.htm
UA: CatchBot/1.0; +http://www.catchbot.com
IP: 203.6.203.nnn
rDNS: Reverse DNS: 203-6-203-nnn.reed-elsevier.com.au.
Reverse DNS authenticity: [Could be forged: hostname 203-6-203-nnn.reed-elsevier.com.au. does not exist]
This bot now does fetch robots.txt and says it obeys it on it's page.