diff --git a/cps/editbooks.py b/cps/editbooks.py
index abef41ce..f14da1bf 100644
--- a/cps/editbooks.py
+++ b/cps/editbooks.py
@@ -317,7 +317,8 @@ def edit_book_ratings(to_save, book):
 def edit_book_tags(tags, book):
     input_tags = tags.split(',')
     input_tags = list(map(lambda it: it.strip(), input_tags))
-    # if input_tags[0] !="": ??
+    # Remove duplicates
+    input_tags = helper.uniq(input_tags)
     return modify_database_object(input_tags, book.tags, db.Tags, calibre_db.session, 'tags')
 
 
@@ -331,8 +332,6 @@ def edit_book_series_index(series_index, book):
     # Add default series_index to book
     modif_date = False
     series_index = series_index or '1'
-    #if series_index == '':
-    #    series_index = '1'
     if book.series_index != series_index:
         book.series_index = series_index
         modif_date = True
@@ -366,6 +365,8 @@ def edit_book_languages(languages, book, upload=False):
         if input_l[0] != current_user.filter_language() and current_user.filter_language() != "all":
             input_l[0] = calibre_db.session.query(db.Languages). \
                 filter(db.Languages.lang_code == current_user.filter_language()).first()
+    # Remove duplicates
+    input_l = helper.uniq(input_l)
     return modify_database_object(input_l, book.languages, db.Languages, calibre_db.session, 'languages')
 
 
@@ -568,6 +569,8 @@ def edit_book(book_id):
         # handle author(s)
         input_authors = to_save["author_name"].split('&')
         input_authors = list(map(lambda it: it.strip().replace(',', '|'), input_authors))
+        # Remove duplicates in authors list
+        input_authors = helper.uniq(input_authors)
         # we have all author names now
         if input_authors == ['']:
             input_authors = [_(u'Unknown')]  # prevent empty Author
@@ -738,6 +741,9 @@ def upload():
                 input_authors = authr.split('&')
                 # handle_authors(input_authors)
                 input_authors = list(map(lambda it: it.strip().replace(',', '|'), input_authors))
+                # Remove duplicates in authors list
+                input_authors = helper.uniq(input_authors)
+
                 # we have all author names now
                 if input_authors == ['']:
                     input_authors = [_(u'Unknown')]  # prevent empty Author
diff --git a/cps/epub.py b/cps/epub.py
index 8b988084..f863db61 100644
--- a/cps/epub.py
+++ b/cps/epub.py
@@ -122,9 +122,14 @@ def get_epub_info(tmp_file_path, original_file_name, original_file_extension):
                 markupTree = etree.fromstring(markup)
                 # no matter xhtml or html with no namespace
                 imgsrc = markupTree.xpath("//*[local-name() = 'img']/@src")
-                # imgsrc maybe startwith "../"" so fullpath join then relpath to cwd
-                filename = os.path.relpath(os.path.join(os.path.dirname(os.path.join(coverpath, coversection[0])), imgsrc[0]))
-                coverfile = extractCover(epubZip, filename, "", tmp_file_path)
+                # Alternative image source
+                if not len(imgsrc):
+                    imgsrc = markupTree.xpath("//attribute::*[contains(local-name(), 'href')]")
+                if len(imgsrc):
+                    # imgsrc maybe startwith "../"" so fullpath join then relpath to cwd
+                    filename = os.path.relpath(os.path.join(os.path.dirname(os.path.join(coverpath, coversection[0])),
+                                                            imgsrc[0]))
+                    coverfile = extractCover(epubZip, filename, "", tmp_file_path)
             else:
                 coverfile = extractCover(epubZip, coversection[0], coverpath, tmp_file_path)
 
diff --git a/cps/helper.py b/cps/helper.py
index b9463416..506613eb 100644
--- a/cps/helper.py
+++ b/cps/helper.py
@@ -468,6 +468,14 @@ def generate_random_password():
     passlen = 8
     return "".join(s[c % len(s)] for c in os.urandom(passlen))
 
+
+def uniq(input):
+  output = []
+  for x in input:
+    if x not in output:
+      output.append(x)
+  return output
+
 ################################## External interface
 
 
diff --git a/cps/web.py b/cps/web.py
index 6c3aabfd..dacb951d 100644
--- a/cps/web.py
+++ b/cps/web.py
@@ -446,7 +446,7 @@ def toggle_read(book_id):
                 new_cc = cc_class(value=1, book=book_id)
                 calibre_db.session.add(new_cc)
                 calibre_db.session.commit()
-        except KeyError:
+        except (KeyError, AttributeError):
             log.error(u"Custom Column No.%d is not exisiting in calibre database", config.config_read_column)
         except OperationalError as e:
             calibre_db.session.rollback()
@@ -1204,7 +1204,7 @@ def render_read_books(page, are_read, as_xml=False, order=None, *args, **kwargs)
                                                                     db_filter,
                                                                     order,
                                                                     db.cc_classes[config.config_read_column])
-        except KeyError:
+        except (KeyError, AttributeError):
             log.error("Custom Column No.%d is not existing in calibre database", config.config_read_column)
             if not as_xml:
                 flash(_("Custom Column No.%(column)d is not existing in calibre database",
@@ -1711,7 +1711,7 @@ def show_book(book_id):
                 try:
                     matching_have_read_book = getattr(entries, 'custom_column_' + str(config.config_read_column))
                     have_read = len(matching_have_read_book) > 0 and matching_have_read_book[0].value
-                except KeyError:
+                except (KeyError, AttributeError):
                     log.error("Custom Column No.%d is not existing in calibre database", config.config_read_column)
                     have_read = None