How do I get rid of the requirement for a SUBJECT for replies? [fixed]

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User offline. Last seen 3 weeks 2 days ago. Offline
Joined: 11/26/2008

That's annoying.

 --  it's an option in the comments setup. 

I would like the subject for comments if it didn't always automatically use the comment text.  If someone doesn't want a subject, it should simply stay empty.