As I have heard of these problems from a few other games (for example a game a few years ago had the same problems with Bink video as Tex Murphy) I'm not at all surprised.
Naturally I'm not happy about the further wait, but in light of the promise (or at least intention) to make the next games ready for linux too I think we linuxers get more out of it than expected. To paraphrase Don Corleone, Larian made me an offer I couldn't refuse ;-)