JS conflict on front end with WP portfolio

Well all in title.

The wp portfolio uses js for layout and that does not work fine on studio. works well on other themes...

works : http://wpmu-blogs.net/portfolio/ (arras)
Does not : http://passion-cheval.net/partenaires/ (studio under buddypress last version. Worked on précédent one)


ps : will NOT deactivate anything this is a production site....