I used installed and activated this plugin and it would not let my site return anything but a white screen. It seems to be a plugin conflict, rather than a conflict with WP core. Are the plugin functions uniquely prefixed?
All the functions in your Plugin need to have unique names that are different from functions in the WordPress core, other Plugins, and themes. For that reason, it is a good idea to use a unique function name prefix on all of your Plugin’s functions. A far superior possibility is to define your Plugin functions inside a class (which also needs to have a unique name).