This applies also to transactions from poloniex to bter and I think any transactions that were made using the wrong chain. Hopefully when we have blockexplorer, Poloniex will sync their chain an get back our Nascoins. Then they can revive balances and NAS trading or maybe just resent NAScoins... The question is to where? Are old bter NAS addresses still valid? If not, I hope they won't just resend NAS again to these addresses. It is better for all who is involved to give them new addresses to withdraw NAS.