The thing that is most obviously wrong is that the window seems to be maximized, leaving space besides the Chess board to draw on. This is not supposed to happen. XBoard's main window should not have a maximize button in the system menu on its frame, and when dragging the window at its boundary for resizing, should always snap back to a size just encasing the board. (And it could be that only the GTK version allows such sizing anyway.)
If there would be no space to draw on, no artifacts could appear there. The XBoard dragging code is just not written to handle dragging outside the board. I don't know why you have this maximize button. When I build XBoard, the window only has close and minimize buttons in its system menu, and I think this is what the code asks for. _______________________________________________ Bug-XBoard mailing list Bug-XBoard@gnu.org https://lists.gnu.org/mailman/listinfo/bug-xboard
