Index: issue_query.rb
===================================================================
--- issue_query.rb	(revision 17930)
+++ issue_query.rb	(working copy)
@@ -379,7 +379,7 @@
     neg = (operator == '!' ? 'NOT' : '')
     subquery = "SELECT 1 FROM #{Journal.table_name} sj" +
       " WHERE sj.journalized_type='Issue' AND sj.journalized_id=#{Issue.table_name}.id AND (#{sql_for_field field, '=', value, 'sj', 'user_id'})" +
-      " AND sj.id = (SELECT MAX(#{Journal.table_name}.id) FROM #{Journal.table_name}" +
+      " AND sj.id IN (SELECT MAX(#{Journal.table_name}.id) FROM #{Journal.table_name}" +
       "   WHERE #{Journal.table_name}.journalized_type='Issue' AND #{Journal.table_name}.journalized_id=#{Issue.table_name}.id" +
       "   AND (#{Journal.visible_notes_condition(User.current, :skip_pre_condition => true)}))"