--- a/mercurial/filelog.py	Fri Jul 09 11:02:39 2010 +0900
+++ b/mercurial/filelog.py	Mon Jul 05 18:43:46 2010 +0900
@@ -53,6 +53,7 @@
         if self.renamed(node):
             return len(self.read(node))
 
+        # XXX if self.read(node).startswith("\1\n"), this returns (size+4)
         return revlog.revlog.size(self, rev)
 
     def cmp(self, node, text):