Updated frontend to rev 7946 to verify bug fixes, however I'm now unable to login.

This is how I sent authentication requests before the latest revision. (Sorry about the order, the JSON library I'm using sets the order)
Sent: {"auth":"","id":0,"method":"user.authenticate","params":

{"user":"apitest","password":"test"}

,"jsonrpc":"2.0"}
Received: {"jsonrpc":"2.0","error":

{"code":-32602,"message":"Invalid params.","data":"Not authorized"}

,"id":0}

If I add an auth field to be the same as the user name, I get the following.
Sent: {"auth":"apitest","id":0,"method":"user.authenticate","params":

{"user":"apitest","password":"test"}

,"jsonrpc":"2.0"}
Received: {"jsonrpc":"2.0","error":

{"code":-32602,"message":"Invalid params.","data":"Not authorized"}

,"id":0}

I have tried multiple user accounts all with proper permission for login via the API.

As a side question, should the auth field be required to authenticate? I would think it should not, but it appears that it is now.