[3sixty]

OK, some weird behavior right out of the gate. When you delete a BuddyPress Group, the Forum doesn’t get deleted. Not sure I want to file this as a bug on trac… as it seems like a good fallback for admins who accidentally hit the prominently placed “Delete Group” drop-down.

In any case, if you delete a Group called “Widgets”, it will leave a zombie Forum item called “Widgets” in the drop down that you can’t get rid of through manually rebuilding the drop-down file.

So it seems like the only way around this is to compare wp_bb_forums to wp_bp_groups and only add an option item where there is a corresponding id/forum_id.