Comment 5 for bug 1645762

I've tested locally using Inkscape.0.91 and 0.92, exports here do not have a grey border, I tested a couple of different things. background colours, transparency settings, image embeded or not.

My best advice is to convert A) logos to svg (best case) or B) remove the circle of white pixels from the images (see gimp's remove background) and replace with a white circle.