Ui rendering fails

[Jan Roorda]

Hi,

I'm facing a rendering problem, and I don't know where it comes from or how to resolve it. This is what I mean with rendering problem:

Link to screenshot

The rendering does not fail all the time, but sometimes it randomly does.
What is this and can I resolve this?

FIY: The application is a Qt Quick 2 application, I'm running it under Ubuntu 14.04 LTS.

Thanks in advance!