PHP Error on every WPMU and WPML plugin

I have had a recurring error since installing WPMU and WPML plugins and recently using simple_error_handler tracked this down to the following error:

STRICT(2048), Non-static method Wdca_AdminPages::serve() should not be called statically

This is apparently inherent on every plugin. Is there a single re-useable code snippit that's called or is this going to require wholesale modification of all the plugins. I am trying to get the WP site to run optimally and clearing every error sytematically. i can't get rid of this one using your plugins. As I've paid for the Pro service, I would hope they would not have these sorts of issues especially after this long a time of deprecation.