--- a/Plugins/VcsPlugins/vcsMercurial/hg.py	Wed Jan 28 19:40:01 2015 +0100
+++ b/Plugins/VcsPlugins/vcsMercurial/hg.py	Wed Jan 28 19:48:55 2015 +0100
@@ -877,7 +877,7 @@
         self.diff = HgDiffDialog(self)
         self.diff.show()
         QApplication.processEvents()
-        self.diff.start(name)
+        self.diff.start(name, refreshable=True)
     
     def vcsStatus(self, name):
         """