Yes, I found this very disappointing, too (and I'm not Czech). I just wanted to see the movie in original version and not dubbed. The same way we're able to choose our operating system for games in each humble bundle, we should be able to choose between original or dubbed for movies.
However, this is not an issue to report to Amanita, but to the Humble team.
Maybe if we all send nice messages asking for it…
contact {@} humblebundle.com By the way billyboob, I liked your comparison between dubbing and 'uncanny valley' effect.