I've seen what I think is the same bug on Webkit/Linux, and I traced it to the text-rendering CSS property. If you can replicate the glitch, try unsetting text-rendering.
It's unlikely anyone else will fix it, either. Linux Chrome doesn't get much love. (Alternatively, it gets a proportionate amount of love to the size of its userbase.)
I'm really sorry I never fixed it. I sometimes use Firefox on sites like this if the rendering really matters. You can also use a user stylesheet to unset it for all sites.