Odd testnet block

[Walter Rothbard]

How can sources and destinations of a transaction be unknown?

http://blockexplorer.com/testnet/block/0000000018b07dca1b28b4b5a119f6d6e71698ce1ed96f143f54179ce177a19c
http://blockexplorer.com/testnet/tx/4852fe372ff7534c16713b3146bbc1e86379c70bea4d5c02fb1fa0112980a081

[Peter Todd]

Two things are going on: block explorer does t understand multisig transactions, which is where the funds game from. Additionally one of the tx outputs has an empty scriptpubkey, which means there are no conditions on spending it, and thus anyone can spend it by providing a scriptsig that evaluates to true such as simply op_true by itself. Again block explorer does t understand that as an address.