I fired up the miner and noticed it's giving 12 coin blocks.. Did I miss something?
Since version 0.9.2.1 the 25% of mining reward goes towards masternodes. This will be compulsory starting 21 July.
Enough nodes seem to have upgraded so that you can now start masternodes on the network and use darksend mixing.
I will post a guide to running a masternode shortly.