I have this strange problem when the yellow color of the background appears, when I made a link to the language, when the submenu of the language is open. This seems to be caused by CSS rotation, which I use to animate the menu when it opens.
This is only visible on screens without a retina.
Here is an image so you can see the problem:

And a link to see it in action: http://cognitif.ca/mci/_integration/
I know that when I comment on the CSS rotation needed for the animation to expand, it stops doing it. Removing rotation is not an option, though, since I want this particular animation.
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