diff --git a/sickbeard/providers/generic.py b/sickbeard/providers/generic.py
index 61703ab7..b81d616b 100644
--- a/sickbeard/providers/generic.py
+++ b/sickbeard/providers/generic.py
@@ -922,7 +922,6 @@ class TorrentProvider(object, GenericProvider):
                 if self.password not in post_params.values():
                     post_params['password'] = self.password
 
-
         response = helpers.getURL(url, post_data=post_params, session=self.session, timeout=timeout)
         if response:
             if logged_in(response):
diff --git a/sickbeard/providers/iptorrents.py b/sickbeard/providers/iptorrents.py
index 8abc5576..b6417c45 100644
--- a/sickbeard/providers/iptorrents.py
+++ b/sickbeard/providers/iptorrents.py
@@ -44,10 +44,14 @@ class IPTorrentsProvider(generic.TorrentProvider):
     def _authorised(self, **kwargs):
 
         return super(IPTorrentsProvider, self)._authorised(
-            logged_in=(lambda x=None: (None is x or 'RSS Link' in x) and self.has_all_cookies() and
+            logged_in=(lambda x='': ('RSS Link' in x) and self.has_all_cookies() and
                        self.session.cookies['uid'] in self.digest and self.session.cookies['pass'] in self.digest),
             failed_msg=(lambda x=None: u'Invalid cookie details for %s. Check settings'))
 
+    @staticmethod
+    def _has_signature(data=None):
+        return generic.TorrentProvider._has_signature(data) or (data and re.search(r'(?i)<title[^<]+?ipt', data))
+
     def _search_provider(self, search_params, **kwargs):
 
         results = []
diff --git a/sickbeard/providers/kat.py b/sickbeard/providers/kat.py
index 8808e0e2..f059a5dc 100644
--- a/sickbeard/providers/kat.py
+++ b/sickbeard/providers/kat.py
@@ -49,7 +49,7 @@ class KATProvider(generic.TorrentProvider):
 
     @staticmethod
     def _has_signature(data=None):
-        return data and (re.search(r'(?sim)(<title>KAT)', data[15:1024:]) or 'kastatic' in data)
+        return data and (re.search(r'(?sim)(<title>KAT)', data[15:1024:]) or 'kastat' in data)
 
     def _find_season_quality(self, title, torrent_link, ep_number):
         """ Return the modified title of a Season Torrent with the quality found inspecting torrent file list """
diff --git a/sickbeard/providers/torrentday.py b/sickbeard/providers/torrentday.py
index 9ded8c53..16d095be 100644
--- a/sickbeard/providers/torrentday.py
+++ b/sickbeard/providers/torrentday.py
@@ -45,10 +45,15 @@ class TorrentDayProvider(generic.TorrentProvider):
     def _authorised(self, **kwargs):
 
         return super(TorrentDayProvider, self)._authorised(
-            logged_in=(lambda x=None: (None is x or 'RSS URL' in x) and self.has_all_cookies() and
+            logged_in=(lambda x='': ('RSS URL' in x) and self.has_all_cookies() and
                        self.session.cookies['uid'] in self.digest and self.session.cookies['pass'] in self.digest),
             failed_msg=(lambda x=None: u'Invalid cookie details for %s. Check settings'))
 
+    @staticmethod
+    def _has_signature(data=None):
+        return generic.TorrentProvider._has_signature(data) or \
+               (data and re.search(r'(?i)<title[^<]+?(td|torrentday)', data))
+
     def _search_provider(self, search_params, **kwargs):
 
         results = []
diff --git a/sickbeard/providers/torrenting.py b/sickbeard/providers/torrenting.py
index 7b1fb831..6379a4e0 100644
--- a/sickbeard/providers/torrenting.py
+++ b/sickbeard/providers/torrenting.py
@@ -43,10 +43,14 @@ class TorrentingProvider(generic.TorrentProvider):
     def _authorised(self, **kwargs):
 
         return super(TorrentingProvider, self)._authorised(
-            logged_in=(lambda x=None: (None is x or 'RSS link' in x) and self.has_all_cookies() and
+            logged_in=(lambda x='': ('RSS link' in x) and self.has_all_cookies() and
                        self.session.cookies['uid'] in self.digest and self.session.cookies['pass'] in self.digest),
             failed_msg=(lambda x=None: u'Invalid cookie details for %s. Check settings'))
 
+    @staticmethod
+    def _has_signature(data=None):
+        return generic.TorrentProvider._has_signature(data) or (data and re.search(r'(?i)<title[^<]+?Torrenting', data))
+
     def _search_provider(self, search_params, **kwargs):
 
         results = []