bbPress.org

Just to make sure (and after taking a backup) I deleted my bbpress plugin folder.

re-downloaded it and re uploaded it.

So using my current theme and installing a fresh copy of bbpress my bbpress.css file loads from within my theme folder.

Your theme doesn’t happen to hard code a css path or anything does it? It could be a plugin loading in the css file or something, but not too sure apart from that, sorry!

P.s. I also used the bbpress-functions.php file from bbp-theme-compat