diff -r dee5afe5301f -r 3f74d0d4af4c src/gui/itemviews/qabstractproxymodel.cpp
--- a/src/gui/itemviews/qabstractproxymodel.cpp	Mon Mar 15 12:43:09 2010 +0200
+++ b/src/gui/itemviews/qabstractproxymodel.cpp	Thu Apr 08 14:19:33 2010 +0300
@@ -127,6 +127,7 @@
     } else {
         d->model = QAbstractItemModelPrivate::staticEmptyModel();
     }
+    d->roleNames = d->model->roleNames();
 }
 
 /*!