--- docutils/frontend.py.org 2012-01-06 12:49:58.815655161 +0900
+++ docutils/frontend.py 2012-01-06 13:12:55.783605996 +0900
@@ -38,7 +38,7 @@
import docutils
import docutils.utils
import docutils.nodes
-from docutils.error_reporting import locale_encoding, ErrorOutput
+from docutils.error_reporting import locale_encoding, ErrorOutput, ErrorString
def store_multiple(option, opt, value, parser, *args, **kwargs):