For some time now SW2010 has drawn a strange star-like figure in place of a sketched circle in a drawing. This happens on drawings only and usually when I zoom out to full view or otherwise refresh the view. It happens to both sketched circles and the circle that is part of the diameter symbol (Ø) as can be seen in the attached screen capture. The lower right end view had a circle representing the OD of the raw stock and it changed to this weird star pattern and so did all the diameter symbols. If I zoom in on an area and then back out again it usually corrects itself. Any idea what's going on?