bbPress.org

it’s not much of a codex, but it’s the only one there is! I wrote quite a lot if it when I started using bbpress – I’m just a bbpress user who helps on here. If you’d like to contribute, post suggested improvements and I’ll add them – just saying 🙂

So if your code was working a few days ago, and it now isn’t, then you must have upgraded the theme, a plugin or changed something else. Without knowing what it’s hard to help.