Actually come to think of it, perhaps the results are coming back before the database entry is even being created. Hmm
I connect cgminer to the mining_proxy which itself connects to the Slush's pool.
Both connections are via Stratum.
This way I get cgminer stable on network outages.
Maybe it is also a reason of getting an extra-fast response by cgminer from the other end of Stratum.
Yes, being a local proxy it responds quickly which is why you can reproduce it. Try 2.8.7 please.