How to downgrade a port?

[Yuan Jue]

Hi all.

I wanna downgrade a port 'cause I found the newest port seems still have
some problems :-(  the question is: how could I do this?

Usually I use portupgrade to upgrade my ports tree. So to downgrade a 
port, is portdowngrade a choice? I notice that portdowngrade has stopped
developing since 2004. Does it stll work now?

Thanks in advance.

-- 
Best Regards
Yuan Jue @ www.yuanjue.net