I'm trying to add some GIF file maps in my pages, but apparently SS is attempting to resize them, despite my trying to override this by setting the dimensions on upload to match the original image (or as close as possible, there appears to be a rounding error in the dialog that makes it impossible to get the same exact dimensions).
This upload process appears to work on preview, but once the page is saved, animations are destroyed and transparency switches to black.
How can I force SilverStripe to upload my images with absolutely NO changes to the files?