Yoast/wordpress-seo — pull request #312 by jrfnl (2013-10-18 12:14:52+00:00)
Title: Fix breaking of plugins url filter hook

Even though it's common to use a PLUGINNAME_URL constant for creating file paths, the use of this breaks the plugins_url filter.

This pull request replaces all uses of the WPSEO_URL constant with the correct usage of plugins_url()