Never mind – I got it, thanks to an old post from two years ago.
The code has changed a bit, so here’s how I fixed it:
1) open up /bb-includes/functions.bb-template.php
2) replace line 1074 with:
return stripslashes(apply_filters( ‘get_topic_title’, $topic->topic_title, $id ));
3) and line 1782:
return stripslashes(apply_filters( ‘get_post_text’, $bb_post->post_text, $bb_post->post_id ));
That did the trick for me.