Pfui - 2:05 am on Oct 4, 2011 (gmt 0)

This isn't a bot but it is a mess. Courtesy of a Fb referrer, broken at a space after Mobile for readability:

Mozilla/5.0 (iPhone; U; CPU iPhone OS 4_3_5 like Mac OS X; en_US) AppleWebKit (KHTML, like Gecko) Mobile
[FBAN/FBForIPhone;FBAV/3.5a;FBBV/3500;FBDV/iPhone3,1;FBMD/iPhone;FBSN/iPhone OS;FBSV/4.3.5;FBSS/2; FBCR/Carrier;FBID/phone;FBLC/en_US]

[Say it ain't so that's anywhere near close to a 'final' version of Fb's iPhone app!]