Quote from: RealBitcoin on July 06, 2015, 01:54:50 PM

Quote from: avatar_kiyoshi on July 06, 2015, 01:52:43 PM

So for now is risky to make a transaction? Without use core wallet?
I used electrum wallet.

I think only incoming transactions are risky, because they can be double spent easily.

Double-spending transactions won't work because transaction included in the blocks in question are invalid blocks and will be rejected in Bitcoin Core 0.10.x or 0.9.5 and Bitcoin Core <0.10.x switches to longer chain(main chain) which will also make those blocks useless. So the transaction you got earlier won't be there when those blocks are rejected. That's why, you should wait for ~30 confirmations or near to it for making sure the transaction you received is included in longer chain(main chain).

Quote from: RealBitcoin on July 06, 2015, 01:54:50 PM

But outgoing transactions should be fine i guess

No, its not. Like in the above case, if your transaction is included in invalid block but not in valid block, your Bitcoins returns to your address when that chain or block is rejected. You will have to make sure your transaction gets enough confirmation.

Quote from: RealBitcoin on July 06, 2015, 01:54:50 PM

Some1 please confirm this!

In other words, wait for more confirmations than usual.

Quote from: jl2012 on July 04, 2015, 01:10:30 PM

- snip -
Payers, technically speaking, are unaffected, despite that your payees may require more confirmations than usual
- snip -