Bump for this question, it hasn't been answered properly. Let me rephrase it to be more explicit:
Has anyone successfully completed LTC multi-signature transaction?
For anyone that cares, we use multi-sig in our wallet solution at Atlas ATS. Any alt-coin that keeps up with Bitcoin development should support this.
I can atleast confirm 100% for LTC, DOGE
Here is withdrawal:
http://ltc.blockr.io/tx/info/2e14f864498c02ec0f6767d30b9229d94c6d446f0d407a0182d6bbb27183d2f0Here is a deposit:
http://ltc.blockr.io/tx/info/f6edd17ffedd9fd0d335711c2c69fecb63b1134dbaf52771e63f03f2de119d3dUnfortunately we have had couple of people who were unable to move LTC to multisig address because the exchange or wallet they use do not support them since they are still running legacy code. Certain block explorers would give you an error if you were to search by the multi-sig address but if you search by transaction hash you should see these transactions.