This was a bug from my side. Validating new usernames got stuck two days ago and I didn't notice. I restarted it and all new usernames were marked as valid/invalid BTC addresses and you should expect payouts today.

Hi Terk,

My balance has been above the threshold for several days now. Where's my payment?  In the meantime I've stopped mining until I receive my BTC payout.

http://www.clevermining.com/users/1B49qTqGUm6ukgNhZv7YNEdnj3h5k4JKoj
Thanks.