Bug 534190 - Acceptance is sent back as "tentative" to outlook users. r=Fallen

calendar/base/src/calItipItem.js

@@ -237,7 +237,6 @@ calItipItem.prototype = {
      */
     setAttendeeStatus: function ciiSAS(aAttendeeId, aStatus) {
         // Append "mailto:" to the attendee if it is missing it.
-        aAttendeeId = aAttendeeId.toLowerCase();
         if (!aAttendeeId.match(/^mailto:/i)) {
             aAttendeeId = ("mailto:" + aAttendeeId);
         }