I found this "fix" on google, Link
Can't seem to get it to work with ch's trainer thought. But its a nice addon that lets you set your own resolution of the game. Aswell as adding a few features like a world map, making it easier to find those sky islands etc.
Hope this helps untill the dev team have figured this out themselves and added better resolution to the game.
[Edited by Drach, 5/24/2011 10:22:29 PM]