This is a widely known issue with downloaded versions of the game. Apparently the issue is with the additional copy protection that Adventure Shop and other download services add to the software. I emailed support about this yesterday after finding out this was the issue, because Daedalic states that there is nothing they can do about it and that you have to contact support for the place you downloaded it from. I highly doubt Adventure Shop isn't aware of the issue, and it upsets me they're still selling the game with such a major known issue with the software conflict. Just google "Whispered World stuttering" and see how many hits on how many forums you get. Ridiculous.
From the Daedalic forum:
http://forum.daedalic.de/viewtopic.p...5a1f32aa6c7e76
