Fixes issue with profile pictures not updating w/o refresh and prevents more ie10 ajax caching issues

web/react/components/post.jsx

@@ -102,7 +102,7 @@ module.exports = React.createClass({
             currentUserCss = "current--user";
         }
 
-        var timestamp = UserStore.getCurrentUser().update_at;
+        var timestamp = UserStore.getProfile(post.user_id).update_at;
 
         return (
             <div>