Font problem with UE4Editor

Hey, I just compiled the current stable branch for Linux (Mint 17) according to the Linux readme on github.
Unfortunately, the font rendering seems to be disfunctional and some icons are missing.

Has anyone experienced something similar? Am I just missing a font here?
Any help would be much appreciated.

It seems to be the same problem I had.
Try the workaround from Editor rendering problems - Platform & Builds - Unreal Engine Forums

Thanks, after reading your post I updated my NVIDIA driver to the latest version from the xedgers-ppa. That fixed the rendering issues seen above.