Hello,
I've researched your situation and it was not related to the December 8th security error. You may have some type of malware on your computer that resulted in your funds being stolen, because your private information was somehow obtained. One of the most common types of these are browser extensions posing as bitcoin price tickers that are actually stealing your account information. There's also the possibility that you visited a phishing site posing as blockchain.info. Scammers send out phishing emails all the time posing as big named companies with the intention of stealing your login credentials. Using TOR to connect to your wallet could also result in a malicious exit node tricking your connection into appearing encrypted, but they are secretly stealing the information without you knowing.
By design, Blockchain.info never has access to users' accounts or bitcoins (more details here: https://blockchain.info/wallet/how-it-works). If you keep your password and private key backups secure, then your bitcoins are safe with blockchain.info. Since this information has been compromised, be sure to never use this wallet or addresses contained within it. I'd also highly advise against using the same password again. Sorry again that you had funds stolen from you. That certainly must be an extremely frustrating experience.
Thats what I suspected. If you still want a different opinion, PM or post in johoe's thread with your address and let him check if yours was compromised due to the reused R value issue.
can you link the thread please sir?
Here is it https://bitcointalksearch.org/topic/reused-r-values-again-581411
Post there with your address, they can check it out. Blcockchain.info had sent mails to all whose private keys were compromised due to athe above error so if you havent received it its likely you didnt face that hack.