diff --git a/src/calibre/ebooks/metadata/epub.py b/src/calibre/ebooks/metadata/epub.py
index bd5f06fa95..29f8978cbc 100644
--- a/src/calibre/ebooks/metadata/epub.py
+++ b/src/calibre/ebooks/metadata/epub.py
@@ -5,7 +5,7 @@ __copyright__ = '2008, Kovid Goyal <kovid at kovidgoyal.net>'
 
 '''Read meta information from epub files'''
 
-import os
+import os, re
 from cStringIO import StringIO
 from contextlib import closing
 
@@ -29,15 +29,15 @@ class Container(dict):
     def __init__(self, stream=None):
         if not stream: return
         soup = BeautifulStoneSoup(stream.read())
-        container = soup.find('container')
+        container = soup.find(name=re.compile(r'container$', re.I))
         if not container:
-            raise OCFException("<container/> element missing")
+            raise OCFException("<container> element missing")
         if container.get('version', None) != '1.0':
             raise EPubException("unsupported version of OCF")
-        rootfiles = container.find('rootfiles')
+        rootfiles = container.find(re.compile(r'rootfiles$', re.I))
         if not rootfiles:
             raise EPubException("<rootfiles/> element missing")
-        for rootfile in rootfiles.findAll('rootfile'):
+        for rootfile in rootfiles.findAll(re.compile(r'rootfile$', re.I)):
             try:
                 self[rootfile['media-type']] = rootfile['full-path']
             except KeyError: