Since a few weeks, i can't customize the thumbnail any more when i add a new page in my favorites. I do it but when i open Speed Dial, the link appears as a classic thumbnail with a random color background and the (white, most of the time) url in the foreground.
Worst, if i modify an old link that was already customised before this bug appears, the thumbnail goes back to a classic text-over-colorfull-background item…
It's sad because it was a really great way to quickly find items in Speed Dial!
Up to date Opera for Windows (v54.0.2952.54 as i am writing)