Andy, as I tell you in several post, I remove all the references to authenticationComponentImpl in the files located at extension directory and the ones located at WEB-INF/classes/alfresco/. Now I use authenticationComponent and still have problems.
Of course I'm working with Alfresco Community 2.0 release. Maybe that works on a preview of Alfresco 2.0.x, but not the available to download.
You have my configuration files posted, do you see any wrong configuration item?
Which example file are you talking about? I post my custom-ntlm-authentication-context.xml , what are wrong with it? In all example files you have references to authenticationComponentImpl, so what example files are you talking about?
Thanks