I'm having a problem with fl_message when it appears in an Fl_Gl_Window. When it returns, it (usually, but not always) leaves part of its window visible in the Fl_Gl_Window, but ONLY there. This suggests that, for some reason, I'm not responding to some system request for repainting the Fl_Gl_Window ... doesn't it? Yet, if I invalidate and redraw the Fl_Gl_Window immediately upon return from fl_message, it may or may not clear the
fl_message window - usually not. Any ideas?

DBG