diff --git a/src/calibre/ebooks/chm/input.py b/src/calibre/ebooks/chm/input.py
index f55a76d67e..61160e8dac 100644
--- a/src/calibre/ebooks/chm/input.py
+++ b/src/calibre/ebooks/chm/input.py
@@ -51,6 +51,7 @@ class CHMInput(InputFormatPlugin):
             mainpath = os.path.join(tdir, mainname)
 
             metadata = get_metadata_from_reader(self._chm_reader)
+            self._chm_reader.CloseCHM()
 
             odi = options.debug_pipeline
             options.debug_pipeline = None
diff --git a/src/calibre/ebooks/oeb/transforms/page_margin.py b/src/calibre/ebooks/oeb/transforms/page_margin.py
index bc1925e343..d7c99d24c6 100644
--- a/src/calibre/ebooks/oeb/transforms/page_margin.py
+++ b/src/calibre/ebooks/oeb/transforms/page_margin.py
@@ -20,8 +20,9 @@ class RemoveAdobeMargins(object):
         self.oeb, self.opts, self.log = oeb, opts, log
 
         for item in self.oeb.manifest:
-            if item.media_type in ('application/vnd.adobe-page-template+xml',
-                    'application/vnd.adobe.page-template+xml'):
+            if (item.media_type in ('application/vnd.adobe-page-template+xml',
+                    'application/vnd.adobe.page-template+xml') and
+                    hasattr(item.data, 'xpath')):
                 self.log('Removing page margins specified in the'
                         ' Adobe page template')
                 for elem in item.data.xpath(
diff --git a/src/calibre/gui2/metadata/basic_widgets.py b/src/calibre/gui2/metadata/basic_widgets.py
index b2ee79c9c0..73913ba58f 100644
--- a/src/calibre/gui2/metadata/basic_widgets.py
+++ b/src/calibre/gui2/metadata/basic_widgets.py
@@ -846,7 +846,7 @@ class RatingEdit(QSpinBox): # {{{
 class TagsEdit(MultiCompleteLineEdit): # {{{
     LABEL = _('Ta&gs:')
     TOOLTIP = '<p>'+_('Tags categorize the book. This is particularly '
-            'useful while searching. <br><br>They can be any words'
+            'useful while searching. <br><br>They can be any words '
             'or phrases, separated by commas.')
 
     def __init__(self, parent):