Hi piuk,
I noticed that the receive api callback from blockchain.info is no longer immediate. I was accepting zero-confirmation payments successfully up until maybe a couple of weeks ago. Here is an example of a generated address for which I'm still awaiting blockchain.info's response:
https://blockchain.info/address/14TdZ3nRTcfLUkRUb8DUTXUZf8Pe6pPwEGDid you make a change to the callback so it no longer responds immediately?
Thanks.
EDIT: FYI, I am using the anonymous payments option.
EDIT2: I finally got a response after 4 confirmations. How can I avoid this delay and get an immediate, zero-confirmation response?