Try here. Link
Portrait is more vertical than horizontal.
[Edited by DABhand, 9/16/2011 1:05:55 PM]
Err... pardon my ignorance here, sorry. I think so. I'm not entirely sure how I go about checking that though. I'm on WinXP SP3.
EDIT: Read your post again. Definitely Landscape.
[Edited by Bes, 9/16/2011 1:08:58 PM]
I fixed the problem. When the game opens, go to "Options" > "Video" > "Screen Resolution" > and then select whichever resolution is marked '(native}'. That fixes it right there! Thanks for the help @LoopDaLoop and @DABhand!