Quote from: torusJKL on September 21, 2014, 12:42:25 PM

Quote from: 100bitcoin on September 21, 2014, 08:56:17 AM

Congratulations !!! You Tx has been included in block 00000000000000001b6ae401ed50b19a1fcb358e6e578511a5544540cb45873f mined by Eligius.

So Blockchain.info does not "cancel" a transaction after 24 hours.

No client can cancel any transaction. It all depends on pools if they want to include it into a block, if no pool wants to include it, it will be forgotten from their mempool. Some clients rebroadcast them for a period of time before stopping, some don't. You have to be lucky for pools to not include your transaction into a block until it is forgotten by the network and your client stop broadcasting.