The GD CPTT plugin is very neat. Congratulations.
in CodeStyling Localisation plugin, there is following warning:
Loading Issue: Author is using load_textdomain instead of load_plugin_textdomain function. This may break behavior of WordPress, because some filters and actions won't be executed anymore. Please contact the Author about that.
Thought, I should post it, maybe it may help you in future. Cheers.