Comment 42 for bug 23267

I can confirm this is an upstream bug, which I wish to fix for years. Fixing it is not to complicated, and won't require too much work, but I am not too familiar with the default fonts that ship with Ubuntu and Linux in general. If someone want to help, please contact me.

Workaround: Installing msttcorefonts (Microsoft Windows core fonts) will make the fonts more readable, but this package is non-free and is not installed by default.