Index: app/models/issue.rb
===================================================================
--- app/models/issue.rb	(revision 7655)
+++ app/models/issue.rb	(working copy)
@@ -95,10 +95,10 @@
         nil
       when 'default'
         user_ids = [user.id] + user.groups.map(&:id)
-        "(#{table_name}.is_private = #{connection.quoted_false} OR #{table_name}.author_id = #{user.id} OR #{table_name}.assigned_to_id IN (#{user_ids}))"
+        "(#{table_name}.is_private = #{connection.quoted_false} OR #{table_name}.author_id = #{user.id} OR #{table_name}.assigned_to_id IN (#{user_ids.join(', ')}))"
       when 'own'
         user_ids = [user.id] + user.groups.map(&:id)
-        "(#{table_name}.author_id = #{user.id} OR #{table_name}.assigned_to_id IN (#{user_ids}))"
+        "(#{table_name}.author_id = #{user.id} OR #{table_name}.assigned_to_id IN (#{user_ids.join(', ')}))"
       else
         '1=0'
       end