[@labsecrets Participant 14 years, 3 months ago]

You posted what appears to be the bbPress functions.php, which is not what I would need to see. I would need to see the functions.php from myriad parent, child, or perhaps any includes that have the function below:

In sum: your myriad parent has a function, on line 24 of the header.php

<body class="<?php mysite_body_class(); ?>">

This function (mysite_body_class()) is what is generating the body class tags. It needs to be modified to allow for the creation of the necessary bbPress body tag for pages that contain bbPress.