In 1.0.2 the support for the bbpress helper plugin was pulled out. This ticket: https://trac.buddypress.org/ticket/853 has the essentials for re-enabling the helper plugin support in 1.0.2.
I stuck the ticket’s attached code into bp-custom.php and it works from there fine. I don’t see any need to hack up a bunch of core files. This is going to be a temporary situation.
We need to still run the bbpress helper plugin and the support code in bp 1.0.2. Nothing is gonna work right otherwise.