I bought the download version of SS 2008 a couple of days ago (I also own SS 2006), and first of all, I'd like to say that the game is really entertaining and fun. However, I too have found it littered with bugs, to the point where I'm wondering if the game has been betatested at all. Also, the 3D performance of the game is rather poor, despite using a video card with an nVidia 7900 GT chip and 512 MB RAM I only get about 22-23 fps at 1024x768, without anti-aliasing turned on! Certain events in the game (such as passing close to another ferry) nearly halt the graphics completely.
Anyway, if the developers need betatesters, I'll be more than happy to participate. I also have a feature request, and that is to add support for anti-aliasing directly in graphic settings of the game.