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Great! Thanks

That'r right. I'm on a Professional version. I logged in to the root user account on my Mac, played around in the program for a few minutes and the issue did not appear at all. Then I logged back to my normal account and it showed up immediately. So it's probably something connected to the user pref...

The driver is 6.3.17-5 so it's up to date. And it happened with earlier drivers too.
Thanks a lot!

Hi

Thanks for the quick response. It does get better when I restart the Mac, although it doesn't make the glitches go away, just makes them smaller, and so it doesn't solve the problem. I don't have a retina so the second solution won't apply either :///

Hi I'm using an iMac mid2011 with a Wacom 13HD and a version of TVPaint 11.0.3. The OS is now Mac Sierra, but my issue happened also on El Capitan. While using the program, I get these strange grey boxes of different sizes over my mouse, especially on Cintiq. These boxes cover my work window as well...