diff -Nur notification-daemon-0.2.1/configure.ac notification-daemon-0.2.1.new/configure.ac
--- notification-daemon-0.2.1/configure.ac	2005-07-28 20:31:54.000000000 +0200
+++ notification-daemon-0.2.1.new/configure.ac	2005-09-19 15:02:12.000000000 +0200
@@ -55,7 +55,7 @@
 AC_TYPE_SIZE_T
 AC_EXEEXT
 
-pkg_modules="gtk+-2.0 >= 2.2.0, glib-2.0 >= 2.2.2, dbus-1 >= 0.20, dbus-glib-1 >= 0.20"
+pkg_modules="gtk+-2.0 >= 2.2.0, glib-2.0 >= 2.2.2, dbus-1 >= 0.20, dbus-glib-1 >= 0.20 libwnck-1.0"
 PKG_CHECK_MODULES(PACKAGE, [$pkg_modules])
 AC_SUBST(PACKAGE_CFLAGS)
 AC_SUBST(PACKAGE_LIBS)
diff -Nur notification-daemon-0.2.1/src/PopupNotification.cc notification-daemon-0.2.1.new/src/PopupNotification.cc
--- notification-daemon-0.2.1/src/PopupNotification.cc	2005-09-19 15:01:55.000000000 +0200
+++ notification-daemon-0.2.1.new/src/PopupNotification.cc	2005-09-19 15:04:51.000000000 +0200
@@ -23,6 +23,8 @@
 #define GTK_DISABLE_DEPRECATED
 #include <gtk/gtk.h>
 #include <gdk/gdk.h>
+#define WNCK_I_KNOW_THIS_IS_UNSTABLE
+#include <libwnck/libwnck.h>
 
 #ifndef _WIN32
 # include <X11/Xlib.h>
@@ -665,6 +667,29 @@
 void
 PopupNotification::show()
 {
+    // check if there is a window in fullscreen mode
+    GList *l = wnck_screen_get_windows(wnck_screen_get_default());
+    for(;l != NULL;l=g_list_next(l)) 
+    {
+       WnckWindow *win = (WnckWindow*)l->data;
+       if(wnck_window_is_fullscreen(win)) 
+       {
+	  // sanity check if the window is _really_ fullscreen to work
+	  // around a bug in libwnck that doesn't get all unfullscreen
+	  // events :/
+	  int sw = wnck_screen_get_width(wnck_screen_get_default());
+	  int sh = wnck_screen_get_height(wnck_screen_get_default());
+	  int x,y,w,h;
+	  wnck_window_get_geometry (win, &x,&y,&w,&h);
+	  if(sw == w && sh == h) 
+	  {
+	     g_message("window %s is fullscreen, skiping notification\n",
+		       wnck_window_get_name(win));
+	     return;
+	  }
+       }
+    }
+
     if (!window) generate();    // can throw
     gtk_widget_show(window);
 }