Index: lxpanel-0.5.8/src/plugins/menu.c
===================================================================
--- lxpanel-0.5.8.orig/src/plugins/menu.c	2011-10-05 23:55:47.000000000 +0200
+++ lxpanel-0.5.8/src/plugins/menu.c	2011-10-05 23:55:49.000000000 +0200
@@ -131,8 +131,8 @@
     int ox, oy, w, h;
     Plugin *p;
 #if GTK_CHECK_VERSION(2,18,0)
-    GtkAllocation allocation;
-    gtk_widget_set_allocation(widget, &allocation);
+    GtkAllocation *allocation = g_new0 (GtkAllocation, 1);
+    gtk_widget_get_allocation(GTK_WIDGET(widget), allocation);
 #endif
     ENTER;
     p = g_object_get_data(G_OBJECT(widget), "plugin");
@@ -155,20 +155,20 @@
         *x = ox;
         if (*x + w > gdk_screen_width())
 #if GTK_CHECK_VERSION(2,18,0)
-            *x = ox + allocation.width - w;
+            *x = ox + allocation->width - w;
 #else
             *x = ox + widget->allocation.width - w;
 #endif
         *y = oy - h;
         if (*y < 0)
 #if GTK_CHECK_VERSION(2,18,0)
-            *y = oy + allocation.height;
+            *y = oy + allocation->height;
 #else
             *y = oy + widget->allocation.height;
 #endif
     } else {
 #if GTK_CHECK_VERSION(2,18,0)
-        *x = ox + allocation.width;
+        *x = ox + allocation->width;
 #else
         *x = ox + widget->allocation.width;
 #endif
@@ -177,19 +177,22 @@
         *y = oy;
         if (*y + h >  gdk_screen_height())
 #if GTK_CHECK_VERSION(2,18,0)
-            *y = oy + allocation.height - h;
+            *y = oy + allocation->height - h;
 #else
             *y = oy + widget->allocation.height - h;
 #endif
     }
     DBG("widget: x,y=%d,%d  w,h=%d,%d\n", ox, oy,
 #if GTK_CHECK_VERSION(2,18,0)
-          allocation.width, allocation.height );
+          allocation->width, allocation->height );
 #else
           widget->allocation.width, widget->allocation.height );
 #endif
     DBG("w-h %d %d\n", w, h);
     *push_in = TRUE;
+#if GTK_CHECK_VERSION(2,18,0)
+    g_free (allocation);
+#endif
     RET();
 }
 
@@ -634,8 +637,8 @@
 {
     ENTER;
 #if GTK_CHECK_VERSION(2,18,0)
-    GtkAllocation allocation;
-    gtk_widget_get_allocation(widget, &allocation);
+    GtkAllocation *allocation = g_new0 (GtkAllocation, 1);
+    gtk_widget_get_allocation(GTK_WIDGET(widget), allocation);
 #endif
 
     /* Standard right-click handling. */
@@ -644,14 +647,17 @@
 
     if ((event->type == GDK_BUTTON_PRESS)
 #if GTK_CHECK_VERSION(2,18,0)
-          && (event->x >=0 && event->x < allocation.width)
-          && (event->y >=0 && event->y < allocation.height)) {
+          && (event->x >=0 && event->x < allocation->width)
+          && (event->y >=0 && event->y < allocation->height)) {
 #else
           && (event->x >=0 && event->x < widget->allocation.width)
           && (event->y >=0 && event->y < widget->allocation.height)) {
 #endif
         show_menu( widget, plugin, event->button, event->time );
     }
+#if GTK_CHECK_VERSION(2,18,0)
+    g_free (allocation);
+#endif
     RET(TRUE);
 }
 
Index: lxpanel-0.5.8/src/plugins/pager.c
===================================================================
--- lxpanel-0.5.8.orig/src/plugins/pager.c	2011-10-05 23:55:47.000000000 +0200
+++ lxpanel-0.5.8/src/plugins/pager.c	2011-10-05 23:56:29.000000000 +0200
@@ -271,10 +271,10 @@
 {
     /* Allocate pixmap and statistics buffer without border pixels. */
 #if GTK_CHECK_VERSION(2,18,0)
-    GtkAllocation allocation;
-    gtk_widget_get_allocation(widget, &allocation);
-    int new_pixmap_width = allocation.width;
-    int new_pixmap_height = allocation.height;
+    GtkAllocation *allocation = g_new0 (GtkAllocation, 1);
+    gtk_widget_get_allocation(GTK_WIDGET(widget), allocation);
+    int new_pixmap_width = allocation->width;
+    int new_pixmap_height = allocation->height;
 #else
     int new_pixmap_width = widget->allocation.width;
     int new_pixmap_height = widget->allocation.height;
@@ -292,8 +292,8 @@
 
         /* Compute the horizontal and vertical scale factors, and mark the desktop for redraw. */
 #if GTK_CHECK_VERSION(2,18,0)
-        d->scale_y = (gfloat) allocation.height / (gfloat) gdk_screen_height();
-        d->scale_x = (gfloat) allocation.width  / (gfloat) gdk_screen_width();
+        d->scale_y = (gfloat) allocation->height / (gfloat) gdk_screen_height();
+        d->scale_x = (gfloat) allocation->width  / (gfloat) gdk_screen_width();
 #else
         d->scale_y = (gfloat) allocation->height / (gfloat) gdk_screen_height();
         d->scale_x = (gfloat) allocation->width  / (gfloat) gdk_screen_width();
@@ -305,6 +305,9 @@
     gtk_widget_set_size_request(widget,
         (d->pg->plugin->panel->icon_size - BORDER_WIDTH * 2) * d->pg->aspect_ratio,
         d->pg->plugin->panel->icon_size - BORDER_WIDTH * 2);
+#if GTK_CHECK_VERSION(2,18,0)
+    g_free (allocation);
+#endif
     return FALSE;
 }
 
@@ -326,8 +329,8 @@
             {
                 GtkWidget * widget = GTK_WIDGET(d->da);
 #if GTK_CHECK_VERSION(2,18,0)
-                GtkAllocation allocation;
-                gtk_widget_get_allocation(widget, &allocation);
+                GtkAllocation *allocation = g_new0 (GtkAllocation, 1);
+                gtk_widget_get_allocation(GTK_WIDGET(widget), allocation);
 #endif
                 gdk_draw_rectangle(
                     d->pixmap,
@@ -336,7 +339,8 @@
                         : style->dark_gc[GTK_STATE_NORMAL]),
                     TRUE,
 #if GTK_CHECK_VERSION(2,18,0)
-                    0, 0, allocation.width, allocation.height);
+                    0, 0, allocation->width, allocation->height);
+                    g_free (allocation);
 #else
                     0, 0, widget->allocation.width, widget->allocation.height);
 #endif