Was reported to me by @Bastenbas
- Go to https://fr.wikipedia.org/w/index.php?title=Table_de_finale&useskin=timeless#/media/File:Chess_nll45.svg
- Move the mouse over the icons at the right
A white rectangle appear on the flyover zone. This object is not transparent, so icon isn't readable.
I suppose that it's a conflict between Extension:Media_Viewer's CSS and Timeless one.