Harmy said:The dubbing I'm using for the DeEds is the original Guild Home Video dubbing.

Thanks for the info. That would mean that the clip I linked to was from the Bonton Home Video dub, as the voices were similar sounding.

Harmy said:it was horrible that whenever Han opened his mouth Luke's voice came out

And you can't even blame Lucas for it. ;) Unless, of course, the BD dub was directed by a Jirí Lukáš - that would actually be pretty awesome. :)

Harmy said:And Vader definitely never says "Jsem tvuj tatinek" (which would be the equivalent of "I'm your daddy") in any of the Czech dubs :-D

I thought that might be the case. It's pretty much an urban legend and you know how reliable those are - somebody made a joke, somebody else misheard it and somebody else still printed it. Also it doesn't help that the Czech language is inherently amusing to us. (It doesn't work the other way round, does it?)