Problems with graphical editor in Quartus ii 13.1

My current system:

Asus laptop

Windows 8.1 64bit

16GB RAM

NVidia GTX 760M

1920x1080 screen resolution

I am experiencing a problem with my symbols where the text is not displayed correctly. It is somewhat irritating but not a complete hindrance. I have attached a couple of screen shots illustrating the problem.

Has anyone else experienced this kind of problem before? Or know how to fix it?

Cheers

Adam Hamilton