diff -up gvfs-1.0.1/monitor/hal/ghalvolume.c.fix-mounting gvfs-1.0.1/monitor/hal/ghalvolume.c
--- gvfs-1.0.1/monitor/hal/ghalvolume.c.fix-mounting	2008-09-10 11:51:23.000000000 -0400
+++ gvfs-1.0.1/monitor/hal/ghalvolume.c	2008-09-29 12:16:02.000000000 -0400
@@ -760,9 +760,10 @@ spawn_cb (GPid pid, gint status, gpointe
   GSimpleAsyncResult *simple;
 
   /* ensure that the #GHalMount corrosponding to the #GHalVolume we've
-   * mounted is made available before returning to the user
+   * mounted is made available before returning to the user (make sure
+   * we don't emit the signals in idle; see #552168).
    */
-  g_hal_volume_monitor_force_update (G_HAL_VOLUME_MONITOR (G_HAL_VOLUME (data->object)->volume_monitor));
+  g_hal_volume_monitor_force_update (G_HAL_VOLUME_MONITOR (G_HAL_VOLUME (data->object)->volume_monitor), FALSE);
 
   if (WEXITSTATUS (status) != 0)
     {
diff -up gvfs-1.0.1/monitor/hal/ghalvolumemonitor.c.fix-mounting gvfs-1.0.1/monitor/hal/ghalvolumemonitor.c
--- gvfs-1.0.1/monitor/hal/ghalvolumemonitor.c.fix-mounting	2008-09-10 11:51:13.000000000 -0400
+++ gvfs-1.0.1/monitor/hal/ghalvolumemonitor.c	2008-09-29 12:16:02.000000000 -0400
@@ -82,7 +82,8 @@ static void hal_changed              (Ha
                                       HalDevice  *device,
                                       gpointer    user_data);
 static void update_all               (GHalVolumeMonitor *monitor,
-                                      gboolean emit_changes);
+                                      gboolean emit_changes,
+                                      gboolean emit_in_idle);
 static void update_drives            (GHalVolumeMonitor *monitor,
                                       GList **added_drives,
                                       GList **removed_drives);
@@ -367,7 +368,7 @@ mountpoints_changed (GUnixMountMonitor *
 {
   GHalVolumeMonitor *monitor = G_HAL_VOLUME_MONITOR (user_data);
 
-  update_all (monitor, TRUE);
+  update_all (monitor, TRUE, TRUE);
 }
 
 static void
@@ -376,13 +377,13 @@ mounts_changed (GUnixMountMonitor *mount
 {
   GHalVolumeMonitor *monitor = G_HAL_VOLUME_MONITOR (user_data);
 
-  update_all (monitor, TRUE);
+  update_all (monitor, TRUE, TRUE);
 }
 
 void 
-g_hal_volume_monitor_force_update (GHalVolumeMonitor *monitor)
+g_hal_volume_monitor_force_update (GHalVolumeMonitor *monitor, gboolean emit_in_idle)
 {
-  update_all (monitor, TRUE);
+  update_all (monitor, TRUE, emit_in_idle);
 }
 
 static void
@@ -394,7 +395,7 @@ hal_changed (HalPool    *pool,
   
   /*g_warning ("hal changed");*/
   
-  update_all (monitor, TRUE);
+  update_all (monitor, TRUE, TRUE);
 }
 
 static GObject *
@@ -448,7 +449,7 @@ g_hal_volume_monitor_constructor (GType 
                     "device_removed", G_CALLBACK (hal_changed),
                     monitor);
 		    
-  update_all (monitor, FALSE);
+  update_all (monitor, FALSE, TRUE);
 
   G_LOCK (hal_vm);
   the_volume_monitor = monitor;
@@ -973,7 +974,8 @@ emit_lists_in_idle (gpointer data)
 /* Must be called from idle if emit_changes, with no locks held */
 static void
 update_all (GHalVolumeMonitor *monitor,
-            gboolean emit_changes)
+            gboolean emit_changes,
+            gboolean emit_in_idle)
 {
   ChangedLists *lists;
   GList *added_drives, *removed_drives;
@@ -1007,7 +1009,10 @@ update_all (GHalVolumeMonitor *monitor,
       lists->added_mounts = added_mounts;
       lists->removed_mounts = removed_mounts;
       
-      g_idle_add (emit_lists_in_idle, lists);
+      if (emit_in_idle)
+        g_idle_add (emit_lists_in_idle, lists);
+      else
+        emit_lists_in_idle (lists);
     }
   else
     {
diff -up gvfs-1.0.1/monitor/hal/ghalvolumemonitor.h.fix-mounting gvfs-1.0.1/monitor/hal/ghalvolumemonitor.h
--- gvfs-1.0.1/monitor/hal/ghalvolumemonitor.h.fix-mounting	2008-09-10 11:51:13.000000000 -0400
+++ gvfs-1.0.1/monitor/hal/ghalvolumemonitor.h	2008-09-29 12:16:02.000000000 -0400
@@ -51,7 +51,8 @@ struct _GHalVolumeMonitorClass {
 GType g_hal_volume_monitor_get_type (void) G_GNUC_CONST;
 
 GVolumeMonitor *g_hal_volume_monitor_new                          (void);
-void            g_hal_volume_monitor_force_update                 (GHalVolumeMonitor *monitor);
+void            g_hal_volume_monitor_force_update                 (GHalVolumeMonitor *monitor,
+                                                                   gboolean emit_in_idle);
 
 G_END_DECLS
 
diff -up gvfs-1.0.1/monitor/proxy/gproxyvolume.c.fix-mounting gvfs-1.0.1/monitor/proxy/gproxyvolume.c
--- gvfs-1.0.1/monitor/proxy/gproxyvolume.c.fix-mounting	2008-09-29 13:26:28.000000000 -0400
+++ gvfs-1.0.1/monitor/proxy/gproxyvolume.c	2008-09-29 13:26:44.000000000 -0400
@@ -539,7 +539,7 @@ mount_cb (DBusMessage *reply,
                                         data->callback,
                                         data->user_data,
                                         NULL);
-  g_simple_async_result_complete (simple);
+  g_simple_async_result_complete_in_idle (simple);
   g_object_unref (simple);
 
   g_object_unref (data->object);