Quote from: btcmad1337 on February 10, 2014, 01:50:36 PM

Quote from: ZephramC on February 10, 2014, 01:38:06 PM

Quote from: btcmad1337 on February 10, 2014, 12:44:58 PM

Quote from: seriouscoin on February 10, 2014, 12:43:39 PM

Any bitcoin-QT since 2012 idiot.

Nope wrong. There are none. If you can find one thats available right now I'll pay you 1BTC. I'm putting my money where my mouth is.

Oficiall bitcoin-QT will correctly identify spent coins even if tx id is modified by third party.
You can download from here: https://bitcoin.org/en/download
You can send 1 BTC to 1ZePhramiDqjYJzqiyUFaY5qhz5k4unRC

LOL! It's vulnerable. I can change the transaction ID in the block still and if you are using the transaction ID to track the payment it'll appear gone to you. Your client will notice the new tx as it gets broadcasted to it but it won't "know" that its actually the other tx.

Of course the client does not "lose" the BTC, no client that I know of does that when the txid is changed in transit.

Why would anyone serious with larger transactions use transaction ID for tracking payments???
Of course Mt.Gox will try to blame the others and mark them as scammers and maybe even hackers. Wink