[2012-10-16 00:26:14] Creating extra submit work thread
[2012-10-16 00:26:14] Submitting share fdb15728 to pool 0
that is the last output from debugging after the miners dieded last night.
The machines with miner 2.8.3 - win32 and started with --fix-protocol didn't die.
so it seems it has todo with stratum and win32.
Thanks! That at least helps me as to where I can look for potential bugs. I'm quite sure it's stratum related.