diff --git a/offlineimap/folder/Base.py b/offlineimap/folder/Base.py
index cf9379a..551a03a 100644
--- a/offlineimap/folder/Base.py
+++ b/offlineimap/folder/Base.py
@@ -104,7 +104,7 @@ class BaseFolder(object):
     def waitforthread(self):
         """Implements method that waits for thread to be usable.
         Should be implemented only for folders that suggest threads."""
-        raise NotImplementedException
+        raise NotImplementedError
 
     # XXX: we may need someting like supports_quickstatus() to check
     # XXX: if user specifies 'quick' flag for folder that doesn't
diff --git a/offlineimap/folder/Gmail.py b/offlineimap/folder/Gmail.py
index 5e07aeb..f051938 100644
--- a/offlineimap/folder/Gmail.py
+++ b/offlineimap/folder/Gmail.py
@@ -203,7 +203,7 @@ class GmailFolder(IMAPFolder):
                 result = self._store_to_imap(imapobj, uid_str, arg, labels_str)
 
             except imapobj.readonly:
-                self.ui.labelstoreadonly(self, uidlist, data)
+                self.ui.labelstoreadonly(self, uidlist, labels)
                 return None
 
             finally:
diff --git a/offlineimap/folder/IMAP.py b/offlineimap/folder/IMAP.py
index 3e8d94c..4801eef 100644
--- a/offlineimap/folder/IMAP.py
+++ b/offlineimap/folder/IMAP.py
@@ -715,7 +715,7 @@ class IMAPFolder(BaseFolder):
             result = self._store_to_imap(imapobj, str(uid), 'FLAGS', imaputil.flagsmaildir2imap(flags))
 
         except imapobj.readonly:
-            self.ui.flagstoreadonly(self, [uid], data)
+            self.ui.flagstoreadonly(self, [uid], flags)
             return
 
         finally:
diff --git a/offlineimap/folder/Maildir.py b/offlineimap/folder/Maildir.py
index 0314f62..d067194 100644
--- a/offlineimap/folder/Maildir.py
+++ b/offlineimap/folder/Maildir.py
@@ -273,7 +273,7 @@ class MaildirFolder(BaseFolder):
             except OSError as e:
                 if e.errno == e.EEXIST:
                     if tries:
-                        time.slep(0.23)
+                        time.sleep(0.23)
                         continue
                     severity = OfflineImapError.ERROR.MESSAGE
                     raise OfflineImapError("Unique filename %s already exists." % \
diff --git a/offlineimap/imapserver.py b/offlineimap/imapserver.py
index 2518058..676dc31 100644
--- a/offlineimap/imapserver.py
+++ b/offlineimap/imapserver.py
@@ -276,7 +276,7 @@ class IMAPServer:
         If any authentication method succeeds, routine should exit:
         warnings for failed methods are to be produced in the
         respective except blocks.
-        
+
         """
 
         # Authentication routines, hash keyed by method name
@@ -489,7 +489,7 @@ class IMAPServer:
                 reason = "Connection to host '%s:%d' for repository '%s' was "\
                     "refused. Make sure you have the right host and port "\
                     "configured and that you are actually able to access the "\
-                    "network." % (self.hostname, self.port, self.reposname)
+                    "network." % (self.hostname, self.port, self.repos)
                 raise OfflineImapError(reason, severity)
             # Could not acquire connection to the remote;
             # socket.error(last_error) raised