Namely, stopped tracking some of the parameters, like mini sentry gun kills: http://www.thehh.co.uk/hlx/hlstats.php? ... 65&game=tf
Notice how the last award was given almost a week ago.
Some actions seem to be ignored partly - I'm not saying the system is biased, but if you check yesterday's ( Feb 2 ) awards for sentry kills, you'll see that best result was 9 kills, yet I clearly remember having made at least 10 kills with my sentries - http://www.thehh.co.uk/hlx/hlstats.php? ... 11&game=tf
The only viable explanation for this apart from this thing being broken is that one or two of the victims were DR spies.