I can’t understand why I have a 1 px border added automatically to my header image.
I inspected the element (image) in Chrome and it says that I have a border-image-width property of 1. (see little border in the image attached)
Has anyone had this problem and know how to fix it?
That’s inside of your image, so nothing can be added by Webflow in it, that’s how your computer renders your image, it seems to not be very good at rendering the alpha.
Your image is huge, 3000px approx. and you’re not using it at size 1:1. Which is problematic for many reasons. You’re making Webflow use it at a smaller size and the shrinking, at various ratio, make the line appear. So figure out the size you need your image to be and make it that size exactly and use it in Webflow without resampling/resizing it. (and do that for ALL and EVERY image on a website, never ever scale it on the fly.