not sure if this is a bug, or just something that hasnt been implemented, but, whenever i alter any of my graphics settings, things go horribly wrong, everything still seems to work, but my graphics go all a little wierd, mainly the in game characters, and anything in the tactical missions (the geoscape seems unaffected) basically an arm might appear white, and a face might look like its red instead of skin colour, it will also alter the shapes slightly of faces or arms.
in the default settings everything is fine, if i change to windowed mode, or alter any of the other settings i run into problems.
i run xp, with a 8600GT, drivers were updated on tuesday, so its possibly an issue with the latest drivers.