Quite a while ago, Behdad filed a bug about not counting reporting bugs that were later marked as duplicate, incomplete, invalid, notabug, or notgnome (actually, he didn’t include incomplete or invalid, I added those later). His description was a bit broken in that it sounded like he didn’t want closing bugs as such to count, but once we got things straightened out, it sounded like a good idea.
Now, even the most conscientious bug reporter is going to occasionally file a duplicate or invalid report. In fact, this change caused me to be one of the people who lost a point. But long term, it makes more sense to not reward mistakes (or worse, active bad behavior) so I think this will be a good change.
Hopefully this change won’t be accompanied with as many weird anomalies as the last one. (*fingers crossed*) If you do see any, though, let me know.