Ok found a good fix for this!
in bbp_signature.php
in function bbp_reply_content_append_user_signature & function bbp_topic_content_append_user_signature
change
$signature = bbp_get_user_signature ( $user_id );
to
$signature = xprofile_get_field_data( ‘Signature’, $user_id );
Then in Buddypress profile fields add a field called Signature.
Bam fixed.
I even went ahead and added a bbcode parser to the plugin so it works real nice. you can download the full fix here
http://vigilsoft.net/bbp-signature_buddypress_edition.zip
