Rectangle source light texture bending with attenuation - i dont want this!;)

Hi ,

want the light source texture to just reflect as light from a window would reflect on the floor [this is exactly what i want - the texture used is just for illustration] and not bend with the attenuation sphere…

im sure it was working this way before in my project but then all of a sudden it is bending as per the image. anyone know how to correct/combat this?