The Cryptome website has published what seems to be the text of this FBI Bulletin regarding almanacs and maps

http://cryptome.org/fbi-almanacs.htm

Are they insulting our intelligence or that of the 18,000 law enforcement agencies that this bulletin was sent to ?

One of the classic IRA terror tactics was to leave copies of Who's Who with the names of several prominent public figures marked, so as to divert security resources away from the real targets.