After a recent update of my Gentoo system, I have noticed that some symbols may be rendered incomplete in a text mode.
It happens in Gvim, in a web-browser and in a dialog-window for saving files. Maybe, also in xterm but I am not quite sure about it. So, it is not specific to any application. For example, while saving a web-page from a google-chrome, I sometimes cannot see a dot before html. However, it is present there. Some letters can be shown without their top parts. In youtube videos, I may see only the lower part of a gear that denotes some customization features and so on. However, I do not see any distortion in playing videos. Does anybody have any idea on what may cause such effects?