From 8e787097ac5766e0f3f4905b709cbcd8a5352410 Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Thu, 16 Dec 2010 08:52:31 -0700
Subject: [PATCH] Fix #7919 (Conversion error)

---
 src/calibre/ebooks/oeb/stylizer.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/calibre/ebooks/oeb/stylizer.py b/src/calibre/ebooks/oeb/stylizer.py
index 616cd3b800..40b82514c1 100644
--- a/src/calibre/ebooks/oeb/stylizer.py
+++ b/src/calibre/ebooks/oeb/stylizer.py
@@ -205,7 +205,10 @@ class Stylizer(object):
                     NameError, # thrown on OS X instead of SelectorSyntaxError
                     SelectorSyntaxError):
                 continue
-            matches = selector(tree)
+            try:
+                matches = selector(tree)
+            except etree.XPathEvalError:
+                continue
 
             if not matches:
                 ntext = capital_sel_pat.sub(lambda m: m.group().lower(), text)