Overlay and Ldap Login

Hi;
I seem to be having a problem related to the LoginLdap plugin when used with the new Overlay feature. When viewing an Overlay I get the error message "Error: Authentication failed". When LoginLdap is disabled and the default Login plugin is used, it works fine. I have also tried granting read access to all reports to user "Anonymous", but I still get the same problem. All the other features in Piwik seem to work great. I have checked and there are no PHP errors or Apache errors that I can see.
Anybody have any ideas that can point me in the right direction, or is there a fix available?

Thanks
Sean