Usually when this problem occurs, I scrub the shot and go back to the film viewer. The problem is still there, so I don't think time is the issue.
-what type of video card?
-have you updated your video drivers recently or lately? or are you like me and don't bother until like 3 or 4 versions have passed ... heh...
has this just recently started showing up, or has it always been there, yet it is intermittent ?.......
could be a "heat" issue or a number of things....... could be that "that specific spitfire skin" has some issues maybe?.........
not much more I can think of right now, with only a picture to go by, I'm sorry
<S>
TC