I have TV attached to my NVIDIA 8800 as a second monitor. On primary monitor, resolution is set up to 1650x1080, on TV it is like ~1270x768 or alike.
When starting Elemental Beta2, there was a complaint that my monitor resolution is set to 1270x768, then the game will run on my primary monitor, but somehow at the max zoom (when map is not cloth anymore) things would look soapy and somehow definitely not for 1650x1080.
HTH,
August
P.S. System was Windows XP.