diff -r dd032b0f02ac -r db397c38005d mercurial/filelog.py
--- a/mercurial/filelog.py	Tue Aug 15 18:30:21 2006 -0500
+++ b/mercurial/filelog.py	Tue Aug 15 22:46:35 2006 -0500
@@ -65,6 +65,16 @@
             return (m["copy"], bin(m["copyrev"]))
         return False
 
+    def size(self, rev):
+        """return the size of a given revision"""
+
+        # for revisions with renames, we have to go the slow way
+        node = self.node(rev)
+        if self.renamed(node):
+            return len(self.read(node))
+
+        return revlog.size(self, rev)
+
     def cmp(self, node, text):
         """compare text with a given file revision"""