[Adam Harley (Kawauso)]

Apart from the template files forum.php and topic.php that use the bb_forum_bread_crumb() (which just builds the breadcrumb for forums / topics), the separator is also hardcoded into several (all?) other template files to give custom titles, which I’m afraid have to be changed by hand.

The only central location would be the default of bb_forum_bread_crumb(), which you shouldn’t change.