diff -ru planner-0.14.3.orig/src/planner-gantt-view.c planner-0.14.3/src/planner-gantt-view.c
--- planner-0.14.3.orig/src/planner-gantt-view.c	2008-08-06 08:23:03.000000000 +0100
+++ planner-0.14.3/src/planner-gantt-view.c	2008-08-06 08:23:48.000000000 +0100
@@ -962,7 +962,7 @@
 {
 	GtkTreeView       *tv = GTK_TREE_VIEW (view->priv->tree);
 	GtkWidget         *gantt = view->priv->gantt;
-	gint               row_height;
+	gint               row_height, separator_height;
 	gint               header_height;
 	gint               height;
 	GList             *cols, *l;
@@ -975,6 +975,9 @@
 	cols = gtk_tree_view_get_columns (tv);
 	row_height = 0;
 	header_height = 0;
+	gtk_widget_style_get(GTK_WIDGET(tv),
+	                     "vertical-separator", &separator_height,
+	                     NULL);
 
 	path = gtk_tree_path_new_first ();
 
@@ -990,6 +993,7 @@
 						    NULL,
 						    NULL,
 						    &height);
+		height += separator_height;
 		row_height = MAX (row_height, height);
 		
 		gtk_tree_view_get_background_area (tv,