EDIT: Please see second post.
I am getting strange results for the WindowWidth, WindowHeight and Viewport dimensions when in full screen scaled mode.
The following two CAPX files are identical except one has a sprite:
Without a sprite, WindowWidth and ViewportRight are returned as 480 (as specified in my project settings under window size). With the small sprite added, WindowWidth is then returned as my real screen width and I don't understand what ViewPortRight is.
WindowWidth/2 is in the centre of the screen when no sprites are in the project but somewhere to the right when the project has a sprite.
I am getting similar results for the other dimensions.
Specified grid co-ordinates don't change (X and Y).
I have tested this in Chrome and Firefox with the same results. I have also updated my ATi Radeon 5060 graphics card driver and tested it on my partners desktop. I have tested it on 32bit and 64bit versions of Windows 7.
I don't know which is version correct. I believe the result returned by my first capx (without the sprite) is more intuitive.
Keep up the good work