Ingo Molnar recently already used the latter:
http://marc.info/?l=linux-kernel&m=121032355203154&w=4
and a reply of mine consisted of now also needing a Reported-By:
http://marc.info/?l=linux-kernel&m=121037403515110&w=4
I must say the Bisected-by thing did feel a bit childish ("ah, I'm not
in it to get the bug fixed but to get my name mentioned!") but hey, I
find things to be offended over easily. From the example it does seem
you probably want both if you have one; if reporter, nailer-downer and
fixer are three seperate people.
Rene.
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