At random when I mouse over items in my taskbar, Opera begins flashing to bright white with a pattern of large, crossing black pixels in the background. Only Opera does this, everything else so far is perfectly fine with me perusing my taskbar for as long as I like. It's enough to give me a headache in the few seconds it happens, but I worry about someone with like photosensitive epilepsy or something running into that. Is this just happening to me?