Setting the angle causes the image to revert to full size. Immediately setting the smaller size again (with width and height swapped for the rotation) doesn't do anything.
The only way I seem to be able to get the scaled down image rotated 90 degrees is to set the locklocation to true, then set the angle. But then, the image is the same shape, even though the image is rotated (and squashed/stretched).
So then I set the new height and width for the rotated shape, and hooray! It looks right, finally.
But then I move the stack to another computer and run it with the player... And it DOESN'T work.

Anyone have a good work-around for dealing with rotated images?