The presence of multisig_tests.cpp in the test suite is somewhat suggestive, I feel.

Not yet tried it, here's the Darkcoin HOW-TO: http://wiki.darkcoin.qa/display/DRK/Multisignature+example


Cheers

Graham

I updated the client again.
As was discovered by elbandi it was impossible to create multisig addresses, I fixed this. Also multisig transactions were considered non-standard by network and were not rebroadcasted and not added to block (although they would be accepted if included in block).
If you need multisig addresses then generate them with newer version and wait for more nodes to upgrade before starting using them.
This is not a hardfork.

Download from: http://spreadcoin.net/