Welcome to WebmasterWorld Guest from 188.8.131.52
Here is some very preliminary info:
Checking my email, I see that this appears to be a known issue. I can't say for certain just yet, but I believe the underlying issue is now resolved - and that we'll now need to wait for stats to catch up.
I'll update as I know more - and please take the above as early info based on what I've been able to glean so far.
My apology for the inconvenience and uncertainty this has caused.