[Aaron]

When I use this option

$bb->wp_table_prefix = false; // 'wp_'; // WordPress table prefix.

Set it to true, and use my prefix, I am running into this error:

bbPress database error: [Table 'dbname.1users' doesn't exist]

SELECT * FROM 1users WHERE user_login = 'ergate' AND SUBSTRING_INDEX( user_pass, '---', 1 ) = '*****[moderated]*****'

bbPress database error: [Table 'dbname.1users' doesn't exist]

SELECT * FROM 1users WHERE user_login = 'ergate'

Even if I intentionally put the wrong db prefix, it still gives this same error.

But as long as I use keep using the old integration code in the config file

// use the WP user table for your bbpress user list

define('CUSTOM_USER_TABLE', 'wp_users');

the login works just fine.