I'm reading a jpg image, setting its background color to
white, then rotating it but the background is always black. I could
change the color with alagad's image.cfc, but can't with CF8. Any
ImageSetBackGroundColor is not meant to be used the way you
are trying to. It is used to mainly with ImageClearrect function.
so If you clear a rectangluar area then the whatever
background area you have set will take that celared rect.
For the problem you are facing, we already have a bug for
ImageRotate and it is on our track.