Uhhhh, what's going on?
Can you tell me how may thread (-t) was used with the miner when this happened?
i had exactly the same problem yesterday, lost a few xpm cause it was before i stood up
im using a 3450 -t4 , maybe that helps...
im back to v4 because i need that coins atm :/
Looks like it happens when the jhPrimeminer client disconnects from the pool and doesn't comes bask to mining on reconnect. I will try to fix it asap.