I always found it strange that in the U.S., conversations about, say, Foucault's Pendulum, don't really touch on the fact that people are reading a translation and not the original work. The vast majority of the readers probably wouldn't even be able to tell you the name of the translator.
I always wonder how different the translation is from the original, and how different it would be from other possible translations. I remember looking at different translations of Lysistrata and feeling like they were almost completely different plays.