I am trying to set up a Facebook page for a business. The page is here:
And the problem I'm having is that Facebook recompresses my header image and creates really ugly artifacts, as you can see. Those artifacts aren't in the original image nor in the version of the image that appears in the gallery, as you can also see if you click on it and download it. (Admittedly, the image features a large area with flat colors, which doesn't help with JPEG compression... but that's the way the business looks from the outside).
I've tried uploading the image with more and less JPEG quality (from 95 to 60), and with bigger and smaller sizes (2000 x 2000, 900 x 600, etc.). Nothing seems to help. What else can be done?