Subject change notes new not old subject

I just changed the subject of a ticket to better track the next step in the
process. The change was duly noted by
a transaction that said:

Subject changed to chuck greenwood email setup by rouilj

Now the question is: where is the original subject message stored?

Has it been wiped from existance? This is rt 1.0.2. I think a case can be
made that
subject transactions should record the subject being replaced as well as
(maybe instead of)
the new subject. Comments?

– rouilj