diff --git a/actions/groupmembers.php b/actions/groupmembers.php
index 038d1db68a..d03d0b5a3a 100644
--- a/actions/groupmembers.php
+++ b/actions/groupmembers.php
@@ -400,7 +400,7 @@ class GroupBlockForm extends Form
             'submit',
             null,
             // TRANS: Submit button title.
-            _m('TOOLTIP',_('Block this user'));
+            _m('TOOLTIP', 'Block this user'));
     }
 }
 
diff --git a/plugins/CasAuthentication/CasAuthenticationPlugin.php b/plugins/CasAuthentication/CasAuthenticationPlugin.php
index 6b751a0aa4..71e54d41f9 100644
--- a/plugins/CasAuthentication/CasAuthenticationPlugin.php
+++ b/plugins/CasAuthentication/CasAuthenticationPlugin.php
@@ -125,13 +125,13 @@ class CasAuthenticationPlugin extends AuthenticationPlugin
     function onInitializePlugin(){
         parent::onInitializePlugin();
         if(!isset($this->server)){
-            throw new Exception(_m("Specifying a server is required.");
+            throw new Exception(_m("Specifying a server is required."));
         }
         if(!isset($this->port)){
-            throw new Exception(_m("Specifying a port is required.");
+            throw new Exception(_m("Specifying a port is required."));
         }
         if(!isset($this->path)){
-            throw new Exception(_m("Specifying a path is required.");
+            throw new Exception(_m("Specifying a path is required."));
         }
         //These values need to be accessible to a action object
         //I can't think of any other way than global variables
diff --git a/plugins/Imap/ImapPlugin.php b/plugins/Imap/ImapPlugin.php
index 1661ed86ea..8d8dbf223f 100644
--- a/plugins/Imap/ImapPlugin.php
+++ b/plugins/Imap/ImapPlugin.php
@@ -54,7 +54,7 @@ class ImapPlugin extends Plugin
             throw new Exception(_m("A mailbox must be specified."));
         }
         if(!isset($this->user)){
-            throw new Exception(_m("A user must be specified.");
+            throw new Exception(_m("A user must be specified."));
         }
         if(!isset($this->password)){
             throw new Exception(_m("A password must be specified."));