Hello
I was fixing an issue we were having with png logos being rendered with white background in emails, so we tried to correct it by setting the "Background" parameter in the respective helper but to no avail.
Looking at the url for the image without using the GetImage method, it renders the image as it should be. Screenshots below shows the diferences between using the method or not.
Can you check if this might be a bug in the GetImage? Or is there something else we should do?