diff -urNad gpaint-0.3.3~/src/callbacks.h gpaint-0.3.3/src/callbacks.h
--- gpaint-0.3.3~/src/callbacks.h	2007-09-05 02:54:08.000000000 -0300
+++ gpaint-0.3.3/src/callbacks.h	2009-12-18 10:56:24.000000000 -0200
@@ -359,18 +359,10 @@
 
 void
 on_foreground_color_picker_color_set   (GtkColorButton *gnomecolorpicker,
-                                        guint            arg1,
-                                        guint            arg2,
-                                        guint            arg3,
-                                        guint            arg4,
                                         gpointer         user_data);
 
 void
 on_background_color_picker_color_set   (GtkColorButton *gnomecolorpicker,
-                                        guint            arg1,
-                                        guint            arg2,
-                                        guint            arg3,
-                                        guint            arg4,
                                         gpointer         user_data);
 
 void
diff -urNad gpaint-0.3.3~/src/color_palette.c gpaint-0.3.3/src/color_palette.c
--- gpaint-0.3.3~/src/color_palette.c	2007-09-10 06:33:17.000000000 -0300
+++ gpaint-0.3.3/src/color_palette.c	2009-12-18 10:56:03.000000000 -0200
@@ -338,7 +338,7 @@
     g_assert(swatch);
     canvas = canvas_lookup(swatch->widget);
     gdk_gc_get_values(swatch->gc, &gcvalues);
-    
+
     if (mode==FOREGROUND)
     {
         change_foreground_color(canvas, &(gcvalues.foreground));
@@ -362,15 +362,12 @@
  */
 void
 on_foreground_color_picker_color_set   (GtkColorButton *gnomecolorpicker,
-                                        guint            arg1,
-                                        guint            arg2,
-                                        guint            arg3,
-                                        guint            arg4,
                                         gpointer         user_data)
 {
-    GdkColor color = {0, arg1, arg2, arg3};
+    GdkColor color;
     gpaint_canvas *canvas = canvas_lookup(GTK_WIDGET(gnomecolorpicker));
     
+    gtk_color_button_get_color(gnomecolorpicker, &color);
     gdk_color_alloc(gdk_colormap_get_system(), &color);
     change_foreground_color(canvas, &color);
 }
@@ -380,15 +377,12 @@
  */
 void
 on_background_color_picker_color_set   (GtkColorButton *gnomecolorpicker,
-                                        guint            arg1,
-                                        guint            arg2,
-                                        guint            arg3,
-                                        guint            arg4,
                                         gpointer         user_data)
 {
-    GdkColor color = {0, arg1, arg2, arg3};
+    GdkColor color;
     gpaint_canvas *canvas = canvas_lookup(GTK_WIDGET(gnomecolorpicker));
 
+    gtk_color_button_get_color(gnomecolorpicker, &color);
     gdk_color_alloc(gdk_colormap_get_system(), &color);
     change_background_color(canvas, &color);
 }