What does this error mean? I have bitcoins but I can not send them. I logged out and back in to no avail. I get the error every time.
This Error means the transaction was pushed out by our server but was not relayed back by any nodes.
It generally happens because blockchain.info allows spending of unconfirmed transactions. Sometimes if a parent transaction has poor network propagation no nodes will have it in their memory pool and any subsequent transactions will spend it will be rejected.
I'm working on improving the issue by repeatedly pushing transactions with poor propagation out again until at at least 100 nodes have accepted it.