Topic: SFTP Public Key Authentication Failing

I've just recently tried to setup an SFTP provider that requires public key authentication, yet DropZone seems to be failing to connect to it consistently with a message that "Public Key Authorization Failed."

I've also tried the SCP extension, but it comes up with the message "Inappropriate ioctl for device."

I've tried this with several SFTP/SCP servers with the same results, however I have no problem connecting to any of these servers from the command-line or using other tools such as Transmit.

Thanks in advance for any help you can provide.