The word 'me' wasn't translation aware.

converse.js

@@ -638,7 +638,7 @@
                     username = msg_dict.fullname;
                 } else  {
                     template = this.message_template;
-                    username = sender === 'me' && sender || msg_dict.fullname;
+                    username = sender === 'me' && __('me') || msg_dict.fullname;
                 }
                 $el.find('div.chat-event').remove();
                 $el.append(

locale/converse.pot

@@ -8,7 +8,7 @@ msgid ""
 msgstr ""
 "Project-Id-Version: Converse.js 0.4\n"
 "Report-Msgid-Bugs-To: \n"
-"POT-Creation-Date: 2013-09-10 22:51+0200\n"
+"POT-Creation-Date: 2013-09-10 23:27+0200\n"
 "PO-Revision-Date: YEAR-MO-DA HO:MI+ZONE\n"
 "Last-Translator: FULL NAME <EMAIL@ADDRESS>\n"
 "Language-Team: LANGUAGE <LL@li.org>\n"
@@ -118,6 +118,10 @@ msgstr ""
 msgid "What's this?"
 msgstr ""
 
+#: converse.js:641
+msgid "me"
+msgstr ""
+
 #: converse.js:757 converse.js:1552
 msgid "Show this menu"
 msgstr ""