I installed the Forum Module on 4.5.0b, set it up, created a Forum, created a Thread OK. When I went in to view the thread I got the following error:

Error running count query for Threads List: Query Failed:SELECT count(*) c FROM threads LEFT JOIN users ON threads.created_by=users.id where (threads.deleted=0 and threads.forum_id='6692d12a-414b-9f83-9974-450ad8477987')::MySQL error 1267: Illegal mix of collations (latin1_swedish_ci,IMPLICIT) and (utf8_general_ci,IMPLICIT) for operation '='