I've received two of these emails from Coinbase, corresponding to my two most recent transactions:

Hi (Shiinee),

On Feb 21, 2013 you purchased 10.00 BTC via bank transfer for $301.13.

Unfortunately, we have decided to cancel this order because it appears to be high risk. We do not send out any bitcoins on high risk transactions, and your bank account will not be charged.

Please understand that we do this to keep the community safe and avoid fraudulent transactions. Apologies if you are one of the good users who gets caught up in this preventitive measure - we don't get it right 100% of the time, but we need to be cautious when it comes to preventing fraud.

You may have more luck trying again in a few weeks. Best of luck and thank you for trying Coinbase.

Kind regards, The Coinbase Team

I can't fathom what would make me a high risk customer, since I buy in low volumes and have connected Coinbase directly to my bank account. Anyone else here have their transaction(s) canceled?