register_widget_control deprecated, but still referenced in 3.0.1

[Ron C]

Turning on WP_DEBUG generates the following when logged in as admin:

Notice: register_sidebar_widget is deprecated since version 2.8! Use wp_register_sidebar_widget() instead. in XXX/wp-includes/functions.php on line 3237

[scribu]

That's because the function that outputs the notice is defined in wp-includes/functions.php

Add this code in a file in mu-plugins.php and you'll see where register_sidebar_widget() is actually called from: ​http://gist.github.com/625748

[scribu]

That's the mu-plugins directory in wp-content. Create it if you don't have it already.

[Ron C]

I think I get it - it's one of the plugins that is using the wrong function.