I have moved my wp directory out of root so that it can be linked as an external with svn. This means that my plugins folder is inside of /custom-content/plugins/ and not /wp/wp-content/plugins. This fact causes this plugin to fail because most of the path references assume a standard setup. I have tried to hack at it a bit using ABSPATH instead but the variable is often unavailble. Anyhoo, there's the bug report, hope it helps. If I find a solution I'll post back.