Works! Had the same problem of WP & bbPress login knocking each other out but followed the steps of gerikg in this post and somehow overlooked (or wasn’t clear enough to me) these:
1. (re. step 4) make sure you prefix the KEY variables with “BB_” when copying to bb_config.php (AUTH_KEY => BB_AUTH_KEY, SECURE_AUTH_KEY => BB_SECURE_AUTH_KEY, LOGGED_IN_KEY=> BB_LOGGED_IN_KEY …)
2. in bbPress WordPress Integration (under bbPress Settings) copy in the values into 3 fields of Cookies directly from the keys that were generated for you (WordPress “auth” cookie salt = AUTH_SALT, WordPress “secure auth” cookie salt = SECURE_AUTH_SALT, WordPress “logged in” cookie salt = LOGGED_IN_SALT) (do not get the values from clicking on the link WordPress admin page, where I couldn’t find all the values anyway)