diff -Naur k3d-source-0.8.0.2.orig/k3dsdk/ngui/main_document_window.cpp k3d-source-0.8.0.2/k3dsdk/ngui/main_document_window.cpp
--- k3d-source-0.8.0.2.orig/k3dsdk/ngui/main_document_window.cpp	2010-07-03 04:27:46.000000000 +0200
+++ k3d-source-0.8.0.2/k3dsdk/ngui/main_document_window.cpp	2011-05-10 17:37:45.749942401 +0200
@@ -1371,7 +1371,7 @@
 			Gtk::HBox import_box(false, 5);
 			Gtk::Label import_label(_("Choose import plugin:"));
 
-			Gtk::ComboBox import_combo(model);
+			Gtk::ComboBox import_combo((Glib::RefPtr<Gtk::TreeModel> &) model);
 			import_combo.pack_start(columns.icon, false);
 			import_combo.pack_start(columns.label);
 			import_combo.set_active(0);
@@ -1461,7 +1461,7 @@
 			Gtk::HBox export_box(false, 5);
 			Gtk::Label export_label(_("Choose export plugin:"));
 
-			Gtk::ComboBox export_combo(model);
+			Gtk::ComboBox export_combo((Glib::RefPtr<Gtk::TreeModel> &) model);
 			export_combo.pack_start(columns.icon, false);
 			export_combo.pack_start(columns.label);
 			export_combo.set_active(0);
diff -Naur k3d-source-0.8.0.2.orig/k3dsdk/ngui/render.cpp k3d-source-0.8.0.2/k3dsdk/ngui/render.cpp
--- k3d-source-0.8.0.2.orig/k3dsdk/ngui/render.cpp	2010-07-03 04:27:46.000000000 +0200
+++ k3d-source-0.8.0.2/k3dsdk/ngui/render.cpp	2011-05-10 17:37:45.750942414 +0200
@@ -169,7 +169,7 @@
 		row[columns.separator] = false;
 	}
 
-	Gtk::ComboBox combo(model);
+	Gtk::ComboBox combo((Glib::RefPtr<Gtk::TreeModel> &) model);
 
 	combo.pack_start(columns.icon, false);
 
@@ -295,7 +295,7 @@
 		row[columns.separator] = false;
 	}
 
-	Gtk::ComboBox combo(model);
+	Gtk::ComboBox combo((Glib::RefPtr<Gtk::TreeModel> &) model);
 
 	combo.pack_start(columns.icon, false);