+
+ graphicView = new QG_GraphicView(document, this);
+//Let's see if the trouble is in the graphicView...
+//And it is... So... How to fix this???
+ setWidget(graphicView);
+//THIS was the problem... Somehow, setting focus on the this widget was screwing
+//*everything* about the MDI system up!
+// graphicView->setFocus();
+