Update: The issue this remixed plugin fixed has since been addressed. Please use the latest version direct form wpml.org

Because of this, we have had to fix the WPML plugin to work with WordPress 3.6 with debug mode on.
While we all wait for WPML to update the plugin, here is a fix: sitepress-multilingual-cms

Note to WPML: I will happily remove this, once the plugin is updated for WordPress 3.6