Karl Kleinpaste <karl(a)justresearch.com&gt; writes: It is not really misused. It just a real race condition. There are loads of legitimate uses for update_frame_window_mirror and I am not sure none of them can occur when a keypress event is in the que. We'll just have to make x_any_window_to_frame smarter. Either by changing the scrollbar check to also check non-current maps or by doing the parent check, like I originally intended. Does anybody know how expensive XtWindowToWidget is? Jan