diff --git a/plugins/Event/EventPlugin.php b/plugins/Event/EventPlugin.php
index d1dda6336d..528c855bda 100644
--- a/plugins/Event/EventPlugin.php
+++ b/plugins/Event/EventPlugin.php
@@ -168,7 +168,7 @@ class EventPlugin extends MicroappPlugin
         $happeningObj = $activity->objects[0];
 
         if ($happeningObj->type != Happening::OBJECT_TYPE) {
-            throw new Exception('Wrong type for object.');
+            throw new Exception(_m('Wrong type for object.'));
         }
 
         $notice = null;
@@ -189,12 +189,12 @@ class EventPlugin extends MicroappPlugin
             $happening = Happening::staticGet('uri', $happeningObj->id);
             if (empty($happening)) {
                 // FIXME: save the event
-                throw new Exception("RSVP for unknown event.");
+                throw new Exception(_m('RSVP for unknown event.'));
             }
             $notice = RSVP::saveNew($actor, $happening, $activity->verb, $options);
             break;
         default:
-            throw new Exception("Unknown verb for events");
+            throw new Exception(_m('Unknown verb for events'));
         }
 
         return $notice;
@@ -225,13 +225,13 @@ class EventPlugin extends MicroappPlugin
         }
 
         if (empty($happening)) {
-            throw new Exception("Unknown object type.");
+            throw new Exception(_m('Unknown object type.'));
         }
 
         $notice = $happening->getNotice();
 
         if (empty($notice)) {
-            throw new Exception("Unknown event notice.");
+            throw new Exception(_m('Unknown event notice.'));
         }
 
         $obj = new ActivityObject();
diff --git a/plugins/Event/RSVP.php b/plugins/Event/RSVP.php
index cce0f6ee56..314d297a36 100644
--- a/plugins/Event/RSVP.php
+++ b/plugins/Event/RSVP.php
@@ -219,7 +219,7 @@ class RSVP extends Managed_DataObject
             return '?';
             break;
         default:
-            throw new Exception("Unknown verb {$verb}");
+            throw new Exception(sprintf(_m('Unknown verb "%s"'),$verb));
         }
     }
 
@@ -236,7 +236,7 @@ class RSVP extends Managed_DataObject
             return RSVP::POSSIBLE;
             break;
         default:
-            throw new Exception("Unknown code {$code}");
+            throw new Exception(sprintf(_m('Unknown code "%s".'),$code));
         }
     }
 
@@ -244,7 +244,7 @@ class RSVP extends Managed_DataObject
     {
         $notice = Notice::staticGet('uri', $this->uri);
         if (empty($notice)) {
-            throw new ServerException("RSVP {$this->id} does not correspond to a notice in the DB.");
+            throw new ServerException(sprintf(_m('RSVP %s does not correspond to a notice in the database.'),$this->id));
         }
         return $notice;
     }
@@ -278,7 +278,7 @@ class RSVP extends Managed_DataObject
     {
         $profile = Profile::staticGet('id', $this->profile_id);
         if (empty($profile)) {
-            throw new Exception("No profile with ID {$this->profile_id}");
+            throw new Exception(sprintf(_m('No profile with ID %s.'),$this->profile_id));
         }
         return $profile;
     }
@@ -287,7 +287,7 @@ class RSVP extends Managed_DataObject
     {
         $event = Happening::staticGet('id', $this->event_id);
         if (empty($event)) {
-            throw new Exception("No event with ID {$this->event_id}");
+            throw new Exception(sprintf(_m('No event with ID %s.'),$this->event_id));
         }
         return $event;
     }
@@ -316,16 +316,16 @@ class RSVP extends Managed_DataObject
 
         switch ($response) {
         case 'Y':
-            $fmt = _m("<span class='automatic event-rsvp'><a href='%1$s'>%2$s</a> is attending <a href='%3$s'>%4$s</a>.</span>");
+            $fmt = _m("<span class='automatic event-rsvp'><a href='%1\$s'>%2\$s</a> is attending <a href='%3\$s'>%4\$s</a>.</span>");
             break;
         case 'N':
-            $fmt = _m("<span class='automatic event-rsvp'><a href='%1$s'>%2$s</a> is not attending <a href='%3$s'>%4$s</a>.</span>");
+            $fmt = _m("<span class='automatic event-rsvp'><a href='%1\$s'>%2\$s</a> is not attending <a href='%3\$s'>%4\$s</a>.</span>");
             break;
         case '?':
-            $fmt = _m("<span class='automatic event-rsvp'><a href='%1$s'>%2$s</a> might attend <a href='%3$s'>%4$s</a>.</span>");
+            $fmt = _m("<span class='automatic event-rsvp'><a href='%1\$s'>%2\$s</a> might attend <a href='%3\$s'>%4\$s</a>.</span>");
             break;
         default:
-            throw new Exception(sprintf(_('Unknown response code %s.'),$response));
+            throw new Exception(sprintf(_m('Unknown response code %s.'),$response));
             break;
         }
 
@@ -351,16 +351,16 @@ class RSVP extends Managed_DataObject
 
         switch ($response) {
         case 'Y':
-            $fmt = _m("%1$s is attending %2$s.");
+            $fmt = _m('%1$s is attending %2$s.');
             break;
         case 'N':
-            $fmt = _m("%1$s is not attending %2$s.");
+            $fmt = _m('%1$s is not attending %2$s.');
             break;
         case '?':
-            $fmt = _m("%1$s might attend %2$s.>");
+            $fmt = _m('%1$s might attend %2$s.');
             break;
         default:
-            throw new Exception("Unknown response code {$response}");
+            throw new Exception(sprintf(_m('Unknown response code %s.'),$response));
             break;
         }
 
diff --git a/plugins/Event/eventform.php b/plugins/Event/eventform.php
index 327c8a31e6..31fecb1278 100644
--- a/plugins/Event/eventform.php
+++ b/plugins/Event/eventform.php
@@ -95,56 +95,56 @@ class EventForm extends Form
         $this->out->input('title',
                           _m('LABEL','Title'),
                           null,
-                          _m('Title of the event'));
+                          _m('Title of the event.'));
         $this->unli();
 
         $this->li();
         $this->out->input('startdate',
                           _m('LABEL','Start date'),
                           null,
-                          _m('Date the event starts'));
+                          _m('Date the event starts.'));
         $this->unli();
 
         $this->li();
         $this->out->input('starttime',
                           _m('LABEL','Start time'),
                           null,
-                          _m('Time the event starts'));
+                          _m('Time the event starts.'));
         $this->unli();
 
         $this->li();
         $this->out->input('enddate',
                           _m('LABEL','End date'),
                           null,   
-                          _m('Date the event ends'));
+                          _m('Date the event ends.'));
         $this->unli();
 
         $this->li();
         $this->out->input('endtime',
                           _m('LABEL','End time'),
                           null,
-                          _m('Time the event ends'));
+                          _m('Time the event ends.'));
         $this->unli();
 
         $this->li();
         $this->out->input('location',
                           _m('LABEL','Location'),
                           null,
-                          _m('Event location'));
+                          _m('Event location.'));
         $this->unli();
 
         $this->li();
         $this->out->input('url',
                           _m('LABEL','URL'),
                           null,
-                          _m('URL for more information'));
+                          _m('URL for more information.'));
         $this->unli();
 
         $this->li();
         $this->out->input('description',
                           _m('LABEL','Description'),
                           null,
-                          _m('Description of the event'));
+                          _m('Description of the event.'));
         $this->unli();
 
         $this->out->elementEnd('ul');
diff --git a/plugins/Event/newevent.php b/plugins/Event/newevent.php
index 7fe80f0857..082f12bb4b 100644
--- a/plugins/Event/newevent.php
+++ b/plugins/Event/newevent.php
@@ -81,7 +81,7 @@ class NeweventAction extends Action
         $this->user = common_current_user();
 
         if (empty($this->user)) {
-            throw new ClientException(_m("Must be logged in to post a event."),
+            throw new ClientException(_m('Must be logged in to post a event.'),
                                       403);
         }
 
@@ -135,13 +135,13 @@ class NeweventAction extends Action
         $this->endTime   = strtotime($end);
 
         if ($this->startTime == 0) {
-            throw new Exception(sprintf(_m('Could not parse date "%s"'),
+            throw new Exception(sprintf(_m('Could not parse date "%s".'),
                                         $start));
         }
 
 
         if ($this->endTime == 0) {
-            throw new Exception(sprintf(_m('Could not parse date "%s"'),
+            throw new Exception(sprintf(_m('Could not parse date "%s".'),
                                         $end));
         }
 
diff --git a/plugins/Event/showrsvp.php b/plugins/Event/showrsvp.php
index f08857dcc4..7b129177e1 100644
--- a/plugins/Event/showrsvp.php
+++ b/plugins/Event/showrsvp.php
@@ -65,7 +65,7 @@ class ShowrsvpAction extends ShownoticeAction
 
         if (empty($this->event)) {
             // TRANS: Client exception thrown when referring to a non-existing event.
-            throw new ClientException(_m('No such Event.'), 404);
+            throw new ClientException(_m('No such event.'), 404);
         }
 
         $notice = $this->rsvp->getNotice();