diff --git a/src/calibre/ebooks/metadata/book/base.py b/src/calibre/ebooks/metadata/book/base.py
index 1eae2e5326..cd2f2a3165 100644
--- a/src/calibre/ebooks/metadata/book/base.py
+++ b/src/calibre/ebooks/metadata/book/base.py
@@ -390,6 +390,9 @@ class Metadata(object):
                 return (None, None, None, None)
             orig_res = res
             cmeta = self.get_user_metadata(key, make_copy=False)
+            if res is None or res == '':
+                return (None, None, None, None)
+            orig_res = res
             name = unicode(cmeta['name'])
             datatype = cmeta['datatype']
             if datatype == 'text' and cmeta['is_multiple']:
diff --git a/src/calibre/gui2/device.py b/src/calibre/gui2/device.py
index b20cd7594f..ae3141db56 100644
--- a/src/calibre/gui2/device.py
+++ b/src/calibre/gui2/device.py
@@ -707,6 +707,10 @@ class DeviceMixin(object): # {{{
         '''
         Called when a device is connected to the computer.
         '''
+        # This can happen as this function is called in a queued connection and
+        # the user could have yanked the device in the meantime
+        if connected and not self.device_manager.is_device_connected:
+            connected = False
         self.set_device_menu_items_state(connected)
         if connected:
             self.device_manager.get_device_information(\
diff --git a/src/calibre/gui2/ui.py b/src/calibre/gui2/ui.py
index f40eed1fcd..f8d50d1cd2 100644
--- a/src/calibre/gui2/ui.py
+++ b/src/calibre/gui2/ui.py
@@ -38,6 +38,7 @@ from calibre.gui2.init import LibraryViewMixin, LayoutMixin
 from calibre.gui2.search_box import SearchBoxMixin, SavedSearchBoxMixin
 from calibre.gui2.search_restriction_mixin import SearchRestrictionMixin
 from calibre.gui2.tag_view import TagBrowserMixin
+from calibre.utils.ordered_dict import OrderedDict
 
 
 class Listener(Thread): # {{{
@@ -97,7 +98,7 @@ class Main(MainWindow, MainWindowMixin, DeviceMixin, # {{{
         MainWindow.__init__(self, opts, parent)
         self.opts = opts
         self.device_connected = None
-        acmap = {}
+        acmap = OrderedDict()
         for action in interface_actions():
             mod, cls = action.actual_plugin.split(':')
             ac = getattr(__import__(mod, fromlist=['1'], level=0), cls)(self,
diff --git a/src/calibre/library/server/opds.py b/src/calibre/library/server/opds.py
index 0eb7379ac5..d495f58fa1 100644
--- a/src/calibre/library/server/opds.py
+++ b/src/calibre/library/server/opds.py
@@ -20,7 +20,6 @@ from calibre.library.comments import comments_to_html
 from calibre.library.server.utils import format_tag_string
 from calibre import guess_type
 from calibre.utils.ordered_dict import OrderedDict
-from calibre.utils.date import format_date
 
 BASE_HREFS = {
         0 : '/stanza',