select() ignored in subquery when querying with count()

Login.where(:date => Date.today).select("DISTINCT player_id").all

As expected, this produces the following query:

SELECT DISTINCT player_id FROM `logins` WHERE (`logins`.`date` = '2010-09-24')

The following uses .count instead of .all and ignores the select("DISTINCT..."):

Login.where(:date => Date.today).select("DISTINCT player_id").count

SELECT COUNT(*) AS count_id FROM (SELECT 1 FROM `logins` WHERE (`logins`.`date` = '2010-09-24')) AS subquery