Just to letting you know dev that I'm running new miner v2.6.2.0 win64 but still experiencing "duplicate share" sometimes.

Hello! if you successfully updated webchain-miner to its 2.6.2.0 version, you are not having "duplicate share" issues, which in the past would have caused you a connection reset.
It might happen that you see the message while mining, but don't worry, it won't cause any effect.
I have two pcs, one win64 and one win86. I can not format now