Index: panel-plugin/xfce-mixer-plugin.c
===================================================================
--- panel-plugin/xfce-mixer-plugin.c	(révision 29690)
+++ panel-plugin/xfce-mixer-plugin.c	(copie de travail)
@@ -238,7 +238,9 @@ xfce_mixer_plugin_size_changed (XfceMixerPlugin *m
   orientation = xfce_panel_plugin_get_orientation (mixer_plugin->plugin);
 
   /* Resize the panel plugin */
-  gtk_widget_set_size_request (GTK_WIDGET (mixer_plugin->plugin), size, size);
+  gtk_widget_set_size_request (GTK_WIDGET (mixer_plugin->plugin),
+                               orientation == GTK_ORIENTATION_HORIZONTAL ? -1 : size,
+                               orientation == GTK_ORIENTATION_VERTICAL ? -1 : size);
 
   /* Determine size for the volume button icons */
   size -= 2 + 2 * MAX (mixer_plugin->button->style->xthickness, mixer_plugin->button->style->ythickness);
Index: panel-plugin/xfce-volume-button.c
===================================================================
--- panel-plugin/xfce-volume-button.c	(révision 29690)
+++ panel-plugin/xfce-volume-button.c	(copie de travail)
@@ -202,7 +202,7 @@ xfce_volume_button_init (XfceVolumeButton *button)
   button->pixbufs = g_new0 (GdkPixbuf*, G_N_ELEMENTS (icons)-1);
 
   /* Create adjustment for the button (from 0.0 to 1.0 in 5% steps) */
-  button->adjustment = gtk_adjustment_new (0.0, 0.0, 1.0, 0.05, 0.05, 0.1);
+  button->adjustment = gtk_adjustment_new (0.0, 0.0, 1.0, 0.05, 0.05, 0.0);
 
   /* Create a new scaled image for the button icon */
   button->image = xfce_scaled_image_new ();