I don't know what's going on, but this is bad.
Normally when something is wrong with the pool, my rigs switch to backuppool.
Not in this case. The shares simply seem to flow into nirvana.
This is awfully bad!
However, there could be an easy solution. For each hour of unaccounted shares (one hour means a bit more than a 4% loss on a daily income), we could have a whole day without the 4% fee.
Or we could just switch pool... and never come back.