I've been noticing this bug for quite some time now, not sure if its known about or even fixed in svn but....
If you kill a dretch for example, and then are killed instantly afterwards yourself, even almost at the exact time you make your own kill. You do not get your kill added to your total number of kills score.
Anyways just thought i'd report it and let the devs do with it what they will.

EDIT: Oh and before someone here pipes in and says i should have used the bug tracker. I would but it has an invalid certificate and therefor i wont use it. Want it in the tracker so badly? The put it in yourself :wink: