Hi.
I've read entire topic here :
https://bitcointalk.org/index.php?topic=108533.0 and I don't quite understand one thing: very often I could read that a miner can "lose their work/shares", for example "Good pools support it (mining.reconnect), so they don't force you to throw away your shares when a disconnect happens"
I thought that as soon as a miner finds a share which is <= share difficulty then it immediately sends it to the pool, so how can it "lose" shares?