[_ck_]

John pointed out something interesting.

even though bbPress 0.9 doesn’t use bb_meta, there still could be corrupt bb_options, which would be topic 0 in the bb_topic_meta table in your database.

You are getting the poll error from your template because the plugin doesn’t exist anymore and the function is missing.

If you have phpmyadmin you can inspect under bb_topic_meta, meta_key active_plugins

In theory you could delete that and then you’d have to reactivate all your plugins.

(I would backup the db first)