AMFPHP Cake constructor arguments causing NetConnection.Call.BadVersion

So… you’re seeing “NetConnection.Call.BadVersion” from Flash while attempting to talk to CPAMF or AMFPHP.
Well my friend, there’s a good probability that something is wrong.
Here are some suggestions:

Fatal Error
Redirect

What I tracked my problem down to was the fact that the following happens when AMFPHP receives a Flash remote object (using remoting):

AMFPHP receives an AMF [...]