Shouts fail to delete in cron - cron fails with SQL error

Old shouts aren't getting deleted since the update to 7.x-1.0-alpha3. I get the following in the log every time cron runs:

PDOException: SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FROM shoutbox s WHERE (s.created < '1393022701')' at line 1: SELECT FROM {shoutbox} s WHERE (s.created < :db_condition_placeholder_0) ; Array ( [:db_condition_placeholder_0] => 1393022701 ) in shoutbox_cron() (line 155 of sites/all/modules/shoutbox/shoutbox.module).