For instance it's linked to the language you declare in the movie information, so I'm french and very very few movies are indentified because it's using french titles ! So I've to turn the language to english to grab the proper informations, and switch back.
And it's not the only problem.
To make it simple, many people are complaining about that for years, nothing have been done, so at least provide a way to use IMDB or TMDB .
Or I'll stop using PowerDVD.