=== modified file 'softwarecenter/ui/gtk3/widgets/apptreeview.py'
--- softwarecenter/ui/gtk3/widgets/apptreeview.py	2012-04-16 09:38:51 +0000
+++ softwarecenter/ui/gtk3/widgets/apptreeview.py	2012-04-24 08:37:44 +0000
@@ -68,7 +68,7 @@
         # we use it so that orca and other a11y tools get proper text to read
         # it needs to be the first one, because that is what the tools look
         # at by default
-        tr = CellRendererAppView(icons,
+        self.tr = tr = CellRendererAppView(icons,
                                  self.create_pango_layout(''),
                                  show_ratings,
                                  Icons.INSTALLED_OVERLAY)
@@ -92,7 +92,7 @@
         tr.button_pack_start(info)
         tr.button_pack_end(action)
 
-        column = Gtk.TreeViewColumn("Applications", tr,
+        self.column = column = Gtk.TreeViewColumn("Applications", tr,
                                     application=AppGenericStore.COL_ROW_DATA)
         column.set_cell_data_func(tr, self._cell_data_func_cb)
         column.set_fixed_width(200)
@@ -144,6 +144,11 @@
             model.clear()
             self.set_model(model)
 
+    def set_model(self, model):
+        self.column.set_cell_data_func(self.tr, None)
+        Gtk.TreeView.set_model(self, model)
+        self.column.set_cell_data_func(self.tr, self._cell_data_func_cb)
+
     def expand_path(self, path):
         if path is not None and not isinstance(path, Gtk.TreePath):
             raise TypeError("Expects Gtk.TreePath or None, got %s" %