graphical bug - analysis mode

Ok. What do you see on http://acid3.acidtests.org/ ?
You should see exactly this http://acid3.acidtests.org/reference.html

Does it match?

Is it a laptop with touchpad and no mouse connected?

Thibault, it matches.
Flugsio, it's not a laptop. it's a PC desktop with a mouse.

Val, Thibault, i have exactly the same problem
acid test is ok for me also.
Shift + Ctrl + F5 does not change anything.
Thks for your kind advise...

Here is an example:

http://fr.lichess.org/vhyaJrur/black

And thks really for this fantastic site !!! (C'est un site génial !)