Over the last few days we had increasing problems with missing and incomplete tracking data. For some interfaces we would only see the incoming or outgoing data, for other interfaces no data was being shown at all.
Inspection of the DTA table in the database showed it was missing in the database as well, so we could rule out the administration console and its queries.
Now off course I was happy things were working again, but I still wanted to know why this had happened. I then came across this blog post by Tord Glad Nordahl, and it seems it is a known bug in the cumulative updates.
So to be clear, the Track Events should be set up like this on all your pipelines where you want tracking to happen.