I dont believe the Phillipines ramped up security like the UK, Britain and India....there wasnt a "worldwide" security upgrade or anything.
ON THE NET...
http://travel.state.gov/travel/cis_pa_tw/pa/pa_1161.html
PUBLIC ANNOUNCEMENT
U.S. DEPARTMENT OF STATE
Office of the Spokesman
This information is current as of today, Fri Sep 01 2006 22:32:26 GMT-0700.
"Worldwide Caution"
June 06, 2006
IMHO they should have, especially since the Philippines are still home to more than one terrorist group.