Was that an isolated hit? Both IP and UA? I ask because it's been years since I've seen that UA in other than a botnet attack (typically courtesy of Russian Federation and/or Chinese Hosts/IPs).
10:38 pm on Oct 25, 2010 (gmt 0)
I put that one down to being used by a botnet that is looking for guestbooks and comment pages to post to. It comes from a variety of IP addresses and usually has the referrer set to the page it is requesting (self referring). The same IP address will use a variety of other Fake UA's (currently I know 112). Check that IP address in Project Honeypot and they will probably have labeled it a Comment Spammer.