Intermittent Graphical Glitch

[king1]

usually when I see that sort of pixilation I think hardware fault, maybe graphics chip or memory. But being specifically localised to the taskbar is odd.

I'd be checking the update history to see if any updates occurred that might have caused it, and I think a memory test would be a good idea as well. I usually use memtest86 for that - usual practice is to test memory modules individually...

I'm not to familiar with linux though so hopefully someone else can chip in...