diff --git a/ChangeLog b/ChangeLog
index 2e1593643e..e0d039d910 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2007-05-22  Sven Neumann  <sven@gimp.org>
+
+	* libgimpwidgets/gimpsizeentry.c
+	* libgimpwidgets/gimpquerybox.c: allocate structs using GSlice.
+
 2007-05-22  Sven Neumann  <sven@gimp.org>
 
 	* libgimpconfig/gimpconfigwriter.c: use GSlice for the
diff --git a/libgimpwidgets/gimpquerybox.c b/libgimpwidgets/gimpquerybox.c
index aa3710ca61..c4fdd01ad2 100644
--- a/libgimpwidgets/gimpquerybox.c
+++ b/libgimpwidgets/gimpquerybox.c
@@ -70,6 +70,7 @@ static QueryBox * create_query_box             (const gchar   *title,
                                                 gpointer       callback_data);
 
 static void       query_box_disconnect         (QueryBox      *query_box);
+static void       query_box_destroy            (QueryBox      *query_box);
 
 static void       string_query_box_response    (GtkWidget     *widget,
                                                 gint           response_id,
@@ -118,7 +119,7 @@ create_query_box (const gchar   *title,
   g_return_val_if_fail (object == NULL || G_IS_OBJECT (object), NULL);
   g_return_val_if_fail (object == NULL || signal != NULL, NULL);
 
-  query_box = g_new0 (QueryBox, 1);
+  query_box = g_slice_new0 (QueryBox);
 
   query_box->qbox = gimp_dialog_new (title, "gimp-query-box",
                                      parent, 0,
@@ -547,6 +548,16 @@ query_box_disconnect (QueryBox *query_box)
                                           query_box);
 }
 
+static void
+query_box_destroy (QueryBox *query_box)
+{
+  /*  Destroy the box  */
+  if (query_box->qbox)
+    gtk_widget_destroy (query_box->qbox);
+
+  g_slice_free (QueryBox, query_box);
+}
+
 static void
 string_query_box_response (GtkWidget *widget,
                            gint       response_id,
@@ -565,11 +576,7 @@ string_query_box_response (GtkWidget *widget,
                                                        string,
                                                        query_box->callback_data);
 
-  /*  Destroy the box  */
-  if (query_box->qbox)
-    gtk_widget_destroy (query_box->qbox);
-
-  g_free (query_box);
+  query_box_destroy (query_box);
 }
 
 static void
@@ -590,11 +597,7 @@ int_query_box_response (GtkWidget *widget,
                                                     value,
                                                     query_box->callback_data);
 
-  /*  Destroy the box  */
-  if (query_box->qbox)
-    gtk_widget_destroy (query_box->qbox);
-
-  g_free (query_box);
+  query_box_destroy (query_box);
 }
 
 static void
@@ -615,11 +618,7 @@ double_query_box_response (GtkWidget *widget,
                                                        value,
                                                        query_box->callback_data);
 
-  /*  Destroy the box  */
-  if (query_box->qbox)
-    gtk_widget_destroy (query_box->qbox);
-
-  g_free (query_box);
+  query_box_destroy (query_box);
 }
 
 static void
@@ -643,11 +642,7 @@ size_query_box_response (GtkWidget *widget,
                                                      unit,
                                                      query_box->callback_data);
 
-  /*  Destroy the box  */
-  if (query_box->qbox)
-    gtk_widget_destroy (query_box->qbox);
-
-  g_free (query_box);
+  query_box_destroy (query_box);
 }
 
 static void
@@ -663,21 +658,12 @@ boolean_query_box_response (GtkWidget *widget,
                                                        GTK_RESPONSE_OK),
                                                       query_box->callback_data);
 
-  /*  Destroy the box  */
-  if (query_box->qbox)
-    gtk_widget_destroy (query_box->qbox);
-
-  g_free (query_box);
+  query_box_destroy (query_box);
 }
 
 static void
 query_box_cancel_callback (QueryBox *query_box)
 {
   query_box_disconnect (query_box);
-
-  /*  Destroy the box  */
-  if (query_box->qbox)
-    gtk_widget_destroy (query_box->qbox);
-
-  g_free (query_box);
+  query_box_destroy (query_box);
 }
diff --git a/libgimpwidgets/gimpsizeentry.c b/libgimpwidgets/gimpsizeentry.c
index 558832e655..c00717a39d 100644
--- a/libgimpwidgets/gimpsizeentry.c
+++ b/libgimpwidgets/gimpsizeentry.c
@@ -153,7 +153,11 @@ gimp_size_entry_finalize (GObject *object)
 
   if (gse->fields)
     {
-      g_slist_foreach (gse->fields, (GFunc) g_free, NULL);
+      GSList *list;
+
+      for (list = gse->fields; list; list = list->next)
+        g_slice_free (GimpSizeEntryField, list->data);
+
       g_slist_free (gse->fields);
       gse->fields = NULL;
     }
@@ -252,10 +256,9 @@ gimp_size_entry_new (gint                       number_of_fields,
 
   for (i = 0; i < number_of_fields; i++)
     {
-      GimpSizeEntryField *gsef;
+      GimpSizeEntryField *gsef = g_slice_new0 (GimpSizeEntryField);
       gint                digits;
 
-      gsef = g_new0 (GimpSizeEntryField, 1);
       gse->fields = g_slist_append (gse->fields, gsef);
 
       gsef->gse               = gse;
@@ -375,7 +378,7 @@ gimp_size_entry_add_field  (GimpSizeEntry *gse,
       g_return_if_fail (GTK_IS_SPIN_BUTTON (refval_spinbutton));
     }
 
-  gsef = g_new0 (GimpSizeEntryField, 1);
+  gsef = g_slice_new0 (GimpSizeEntryField);
 
   gse->fields = g_slist_prepend (gse->fields, gsef);
   gse->number_of_fields++;