This is where people run into problems constantly. They claim to have problems with the blockchain, while they actually have a problem with the service blockchain.info. I dont think its important whether you use "block chain", "blockchain" or "Blockchain" as long as you use something distinct when refering to the service blockchain.info like e.g. bc.i.


Sadly there are many mistakes due to people thinking something is official regarding to bitcoin. There is no official client, no official blockchain explorer etc. This typically leads to confusing statements, like: "the blockchain is broken".