--- a/__init__.py	Tue Feb 14 11:34:53 2012 +0100
+++ b/__init__.py	Tue Feb 14 15:16:42 2012 +0100
@@ -117,6 +117,7 @@
                     binary.write(chunk)
             else:
                 binary.write(fobj.read())
+        binary.seek(0)
         return binary