diff --git a/ebook_converter/ebooks/conversion/plugins/html_input.py b/ebook_converter/ebooks/conversion/plugins/html_input.py
index 05571e5..7aa2d6d 100644
--- a/ebook_converter/ebooks/conversion/plugins/html_input.py
+++ b/ebook_converter/ebooks/conversion/plugins/html_input.py
@@ -237,7 +237,7 @@ class HTMLInput(InputFormatPlugin):
         if not os.access(link, os.R_OK):
             return link_
         if os.path.isdir(link):
-            self.log.warning(link_, 'is a link to a directory. Ignoring.')
+            self.log.warning('%s is a link to a directory. Ignoring.', link_)
             return link_
         if link not in self.added_resources:
             bhref = os.path.basename(link)
diff --git a/ebook_converter/ebooks/mobi/mobiml.py b/ebook_converter/ebooks/mobi/mobiml.py
index ad740cf..05c4156 100644
--- a/ebook_converter/ebooks/mobi/mobiml.py
+++ b/ebook_converter/ebooks/mobi/mobiml.py
@@ -452,7 +452,7 @@ class MobiMLizer(object):
                 try:
                     item = self.oeb.manifest.hrefs[base.urlnormalize(href)]
                 except:
-                    self.oeb.logger.warning('Failed to find image:', href)
+                    self.oeb.logger.warning('Failed to find image: %s', href)
                 else:
                     try:
                         width, height = identify(item.data)[1:]
diff --git a/ebook_converter/ebooks/mobi/writer2/indexer.py b/ebook_converter/ebooks/mobi/writer2/indexer.py
index a47c045..6e3b564 100644
--- a/ebook_converter/ebooks/mobi/writer2/indexer.py
+++ b/ebook_converter/ebooks/mobi/writer2/indexer.py
@@ -444,8 +444,8 @@ class Indexer(object):  # {{{
         if self.is_periodical and self.masthead_offset is None:
             raise ValueError('Periodicals must have a masthead')
 
-        self.log('Generating MOBI index for a %s', 'periodical' if
-                 self.is_periodical else 'book')
+        self.log.info('Generating MOBI index for a %s', 'periodical' if
+                      self.is_periodical else 'book')
         self.is_flat_periodical = False
         if self.is_periodical:
             periodical_node = next(iter(oeb.toc))
diff --git a/ebook_converter/ebooks/odt/input.py b/ebook_converter/ebooks/odt/input.py
index 602927f..a0708f0 100644
--- a/ebook_converter/ebooks/odt/input.py
+++ b/ebook_converter/ebooks/odt/input.py
@@ -18,6 +18,7 @@ from ebook_converter.ebooks.oeb.base import _css_logger
 from ebook_converter import polyglot
 
 
+
 class Extract(ODF2XHTML):
 
     def extract_pictures(self, zf):