I first noticed something was wrong because my client knew about 2 blocks that blockchain.info didn't...
The issue appears to have been resolved now.
[Edit: The Twitter account had addressed the issue in their status update:
Apologies for the downtime. Looking into it now.
-
https://twitter.com/blockchain/status/285788380099391489 ]
[Edit2:
From another thread:
Sorry everyone one server crashed, should be fully functional now, have a great new year.
]