It looks like the TPU stats haven't updated since October 20. I'm looking into it.
Update: it's because the WAN IP changed. I've asked the hosting provider (ASO) to make the required change.
Update #2: Fixed. Stats should be up to date now.
Update #3 (2012Nov04): The stats stopped working again on about Oct 27. ASO had to make another change, and stats seem to be working now.