From 440c02a202bfa3af464c9c6424a4e96ca7e1fbf9 Mon Sep 17 00:00:00 2001
From: "Marshall T. Vandegrift" <llasram@gmail.com>
Date: Mon, 2 Mar 2009 08:37:24 -0500
Subject: [PATCH] Fix #1933.  Sanitize CSS clasnames for MSReader.

---
 src/calibre/ebooks/oeb/transforms/flatcss.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/calibre/ebooks/oeb/transforms/flatcss.py b/src/calibre/ebooks/oeb/transforms/flatcss.py
index 63466ac551..6d15ca250a 100644
--- a/src/calibre/ebooks/oeb/transforms/flatcss.py
+++ b/src/calibre/ebooks/oeb/transforms/flatcss.py
@@ -219,7 +219,7 @@ class CSSFlattener(object):
             items.sort()
             css = u';\n'.join(u'%s: %s' % (key, val) for key, val in items)
             classes = node.get('class', None) or 'calibre'
-            klass = STRIPNUM.sub('', classes.split()[0])
+            klass = STRIPNUM.sub('', classes.split()[0].replace('_', ''))
             if css in styles:
                 match = styles[css]
             else: