Black areas on window
Using GeoGebra 5.0.275.0-3D on Ubuntu Mate 14.04, when I restore a window I minimized before, it appears with black areas which reveal the original buttons when I move the mouse over them.
This happen to me since a long time.
I tried to install java 8 jre but didn't help. Affects also my 32bit laptop.
Architecture: amd64 / null
CAS: CAS Initializing