I think I have flashed since then but I didn't do it for that particular problem. I have not seen the problem for a long time so maybe that helped. However I think I did see it on very rare occasions after I flashed it. Can I ask, what is the temperature like where you are? It may be temperature/voltage related. I often see this type of corruption in computers when graphics ram is not cooled or under/over rated voltage. However my post is from January which makes me believe that temperature isn't the problem (unless I was in a sauna at that time ).