probably a graphics driver issue if this happens in other browser too. try to use the free drivers instead of the proprietary ones (e.g. nv instead of nvidia; ati instead of fglrx); if not its most likely bad hardware/ check your memory.
probably a graphics driver issue if this happens in other browser too. try to use the free drivers instead of the proprietary ones (e.g. nv instead of nvidia; ati instead of fglrx); if not its most likely bad hardware/ check your memory.