Index: libwnck/tasklist.c
===================================================================
--- libwnck/tasklist.c	(révision 1351)
+++ libwnck/tasklist.c	(copie de travail)
@@ -3831,6 +3831,7 @@ wnck_task_expose (GtkWidget        *widg
   GdkGC *lgc, *dgc;
   int x, y, i, j;
   WnckTask *task;
+  GdkRectangle rect;
 
   task = WNCK_TASK (data);
   
@@ -3856,10 +3857,7 @@ wnck_task_expose (GtkWidget        *widg
       /* Fall through to get screenshot
        */
     case WNCK_TASK_WINDOW:
-      if ((event->area.x <= widget->allocation.x) &&
-          (event->area.y <= widget->allocation.y) &&
-          (event->area.width >= widget->allocation.width) &&
-          (event->area.height >= widget->allocation.height))
+      if (gdk_rectangle_intersect (&event->area, &widget->allocation, &rect))
         {
           if (task->start_needs_attention)
             {