diff --git a/SABnzbd.py b/SABnzbd.py
index 1022d3e..c89f108 100755
--- a/SABnzbd.py
+++ b/SABnzbd.py
@@ -395,14 +395,15 @@ def print_modules():
         if sabnzbd.decoder.SABYENC_VERSION:
             # We have a VERSION, thus a SABYenc module, but it's not the correct version
             logging.error(
-                T("SABYenc disabled: no correct version found! (Found v%s, expecting v%s)")
-                % (sabnzbd.decoder.SABYENC_VERSION, sabnzbd.constants.SABYENC_VERSION_REQUIRED)
+                T("SABYenc disabled: no correct version found! (Found v%s, expecting v%s)"),
+                sabnzbd.decoder.SABYENC_VERSION,
+                sabnzbd.constants.SABYENC_VERSION_REQUIRED,
             )
         else:
             # No SABYenc module at all
             logging.error(
-                T("SABYenc module... NOT found! Expecting v%s - https://sabnzbd.org/sabyenc")
-                % sabnzbd.constants.SABYENC_VERSION_REQUIRED
+                T("SABYenc module... NOT found! Expecting v%s - https://sabnzbd.org/sabyenc"),
+                sabnzbd.constants.SABYENC_VERSION_REQUIRED,
             )
         # Do not allow downloading
         sabnzbd.NO_DOWNLOADING = True
@@ -419,9 +420,7 @@ def print_modules():
     if sabnzbd.newsunpack.MULTIPAR_COMMAND:
         logging.info("MultiPar binary... found (%s)", sabnzbd.newsunpack.MULTIPAR_COMMAND)
     elif sabnzbd.WIN32:
-        logging.error(
-            "%s %s" % (T("MultiPar binary... NOT found!"), T("Verification and repair will not be possible."))
-        )
+        logging.error("%s %s", T("MultiPar binary... NOT found!"), T("Verification and repair will not be possible."))
 
     if sabnzbd.newsunpack.RAR_COMMAND:
         logging.info("UNRAR binary... found (%s)", sabnzbd.newsunpack.RAR_COMMAND)
@@ -430,9 +429,7 @@ def print_modules():
         if sabnzbd.newsunpack.RAR_PROBLEM and not sabnzbd.cfg.ignore_wrong_unrar():
             have_str = "%.2f" % (float(sabnzbd.newsunpack.RAR_VERSION) / 100)
             want_str = "%.2f" % (float(sabnzbd.constants.REC_RAR_VERSION) / 100)
-            logging.warning(
-                T("Your UNRAR version is %s, we recommend version %s or higher.<br />") % (have_str, want_str)
-            )
+            logging.warning(T("Your UNRAR version is %s, we recommend version %s or higher.<br />"), have_str, want_str)
         elif not (sabnzbd.WIN32 or sabnzbd.DARWIN):
             logging.info("UNRAR binary version %.2f", (float(sabnzbd.newsunpack.RAR_VERSION) / 100))
     else:
@@ -1167,8 +1164,8 @@ def main():
         logging.warning(
             T(
                 "SABnzbd was started with encoding %s, this should be UTF-8. Expect problems with Unicoded file and directory names in downloads."
-            )
-            % sabnzbd.encoding.CODEPAGE
+            ),
+            sabnzbd.encoding.CODEPAGE,
         )
 
     # SSL Information
diff --git a/sabnzbd/interface.py b/sabnzbd/interface.py
index d8a33a1..169d2fe 100644
--- a/sabnzbd/interface.py
+++ b/sabnzbd/interface.py
@@ -342,7 +342,7 @@ def log_warning_and_ip(txt):
         )
     else:
         txt = "%s %s>%s" % (txt, cherrypy.request.remote.ip, cherrypy.request.headers.get("User-Agent", "??"))
-    logging.warning("%s", txt)
+    logging.warning(txt)
 
 
 ##############################################################################
diff --git a/sabnzbd/newsunpack.py b/sabnzbd/newsunpack.py
index 94f11b1..55c911a 100644
--- a/sabnzbd/newsunpack.py
+++ b/sabnzbd/newsunpack.py
@@ -46,6 +46,7 @@ from sabnzbd.filesystem import (
     recursive_listdir,
     setname_from_path,
     get_ext,
+    get_filename,
 )
 from sabnzbd.sorting import SeriesSorter
 import sabnzbd.cfg as cfg
@@ -669,7 +670,7 @@ def rar_extract(rarfile_path, numrars, one_folder, nzo, setname, extraction_path
             break
 
     if fail == 2:
-        logging.error("%s (%s)", T("Unpacking failed, archive requires a password"), os.path.split(rarfile_path)[1])
+        logging.error("%s (%s)", T("Unpacking failed, archive requires a password"), get_filename(rarfile_path))
     return fail, new_files, rars
 
 
@@ -848,7 +849,7 @@ def rar_extract_core(rarfile_path, numrars, one_folder, nzo, setname, extraction
             p.kill()
 
         elif line.startswith("ERROR: "):
-            msg = T("ERROR: %s" % line[7:])
+            msg = T("ERROR: %s") % line[7:]
             nzo.fail_msg = msg
             logging.warning(msg)
             nzo.set_unpack_info("Unpack", msg, setname)
diff --git a/sabnzbd/notifier.py b/sabnzbd/notifier.py
index d2fd025..e4acea8 100644
--- a/sabnzbd/notifier.py
+++ b/sabnzbd/notifier.py
@@ -360,7 +360,7 @@ def send_nscript(title, msg, gtype, force=False, test=None):
         if script_path:
             output, ret = external_script(script_path, gtype, title, msg, parameters)
             if ret:
-                logging.error(T('Script returned exit code %s and output "%s"') % (ret, output))
+                logging.error(T('Script returned exit code %s and output "%s"'), ret, output)
                 return T('Script returned exit code %s and output "%s"') % (ret, output)
             else:
                 logging.info("Successfully executed notification script " + script_path)