diff --git a/BUGS.md b/BUGS.md
index 5ad9115..ce818f8 100644
--- a/BUGS.md
+++ b/BUGS.md
@@ -1,7 +1,7 @@
 
 # BUGS
 
-- falha no file handler de vez em quando, nao sei porquê...
+- falha intermitent no file handler quando o browser envia 2 GET requests ao mesmo tempo (porquê?)
 - nos topicos learn.yaml, qd falha acrescenta no fim. nao faz sentido.
 - ocorreu uma vez o sqlalchemy dar mesg erro a indicar que as threads sao diferents quando se faz o get da primeira pergunta do topico. Muitas vezes nao mostar erro, mas a pagina da erro ou fica em branco...
 
diff --git a/serve.py b/serve.py
index 22fb1fd..6c29311 100755
--- a/serve.py
+++ b/serve.py
@@ -16,6 +16,7 @@ import functools
 import tornado.ioloop
 import tornado.web
 import tornado.httpserver
+from tornado.escape import to_unicode
 
 # this project
 from learnapp import LearnApp
@@ -122,9 +123,9 @@ class ChangePasswordHandler(BaseHandler):
 
         changed_ok = await self.learn.change_password(uid, pw)
         if changed_ok:
-            notification = tornado.escape.to_unicode(self.render_string('notification.html', type='success', msg='A password foi alterada!'))
+            notification = to_unicode(self.render_string('notification.html', type='success', msg='A password foi alterada!'))
         else:
-            notification = tornado.escape.to_unicode(self.render_string('notification.html', type='danger', msg='A password não foi alterada!'))
+            notification = to_unicode(self.render_string('notification.html', type='danger', msg='A password não foi alterada!'))
         self.write({'msg': notification})
 
 
@@ -141,7 +142,6 @@ class RootHandler(BaseHandler):
             name=self.learn.get_student_name(uid),
             state=self.learn.get_student_state(uid),
             title=self.learn.get_title(),
-            # get_topic_type=self.learn.get_topic_type,  # function
             )
 
 
@@ -172,12 +172,13 @@ class TopicHandler(BaseHandler):
 # ----------------------------------------------------------------------------
 
 # FIXME error in many situations... images are not shown...
-
+# seems to happen when the browser sends two GET requests at the same time
 class FileHandler(BaseHandler):
     SUPPORTED_METHODS = ['GET']
 
     @tornado.web.authenticated
-    async def get(self, filename):
+    # async
+    def get(self, filename):
         uid = self.current_user
         public_dir = self.learn.get_current_public_dir(uid)
         filepath = path.expanduser(path.join(public_dir, filename))
@@ -191,12 +192,13 @@ class FileHandler(BaseHandler):
         else:
             content_type = mimetypes.guess_type(filename)
             self.set_header("Content-Type", content_type[0])
-
             # divide the file into chunks and write one chunk at a time, so
             # that the write does not block the ioloop for very long.
             with f:
-                self.write(f.read())
-                await self.flush()
+                data = f.read()
+                self.write(data)
+                # await self.flush()
+                self.flush()
 
 
 # ----------------------------------------------------------------------------
@@ -226,24 +228,24 @@ class QuestionHandler(BaseHandler):
         q = self.learn.get_current_question(user)
 
         if q is not None:
-            question_html = self.render_string(self.templates[q['type']],
-                question=q, md=md_to_html)
+            question_html = to_unicode(self.render_string(self.templates[q['type']],
+                question=q, md=md_to_html))
             response = {
                 'method': 'new_question',
                 'params': {
                     'type': q['type'],
-                    'question': tornado.escape.to_unicode(question_html),
+                    'question': question_html,
                     'progress': self.learn.get_student_progress(user),
                     'tries': q['tries'],
-                    },
+                    }
                 }
 
         else:
-            finished_topic_html = self.render_string('finished_topic.html')
+            finished_topic_html = to_unicode(self.render_string('finished_topic.html'))
             response = {
                 'method': 'finished_topic',
                 'params': {
-                    'question': tornado.escape.to_unicode(finished_topic_html)
+                    'question': finished_topic_html
                     }
                 }
 
@@ -275,8 +277,9 @@ class QuestionHandler(BaseHandler):
                 comments=q['comments'], md=md_to_html)
 
             response['params'] = {
+                'type': q['type'],
                 'progress': self.learn.get_student_progress(user),
-                'comments': tornado.escape.to_unicode(comments_html),
+                'comments': to_unicode(comments_html),
                 'tries': q['tries'],
                 }
 
@@ -285,21 +288,23 @@ class QuestionHandler(BaseHandler):
                 comments=q['comments'], md=md_to_html)
 
             response['params'] = {
+                    'type': q['type'],
                     'progress': self.learn.get_student_progress(user),
-                    'comments': tornado.escape.to_unicode(comments_html), # FIXME
+                    'comments': to_unicode(comments_html),
                     'tries': q['tries'],
                     }
 
         elif action == 'wrong':  # no more tries
-            comments_html = self.render_string('comments.html',
-                comments=q['comments'], md=md_to_html)
-            solution_html = self.render_string('solution.html',
-                solution=q['solution'], md=md_to_html)
+            comments_html = to_unicode(self.render_string('comments.html',
+                comments=q['comments'], md=md_to_html))
+            solution_html = to_unicode(self.render_string('solution.html',
+                solution=q['solution'], md=md_to_html))
 
             response['params'] = {
+                'type': q['type'],
                 'progress': self.learn.get_student_progress(user),
-                'comments': tornado.escape.to_unicode(comments_html),
-                'solution': tornado.escape.to_unicode(solution_html),
+                'comments': comments_html,
+                'solution': solution_html,
                 'tries': q['tries'],
                 }
 
diff --git a/static/js/topic.js b/static/js/topic.js
index 4a5a51e..810471c 100644
--- a/static/js/topic.js
+++ b/static/js/topic.js
@@ -26,7 +26,6 @@ function updateQuestion(response) {
 
     switch (method) {
     case "new_question":
-        console.log(params["type"]);
         new_question(params["type"], params["question"], params["tries"], params["progress"]);
         break;
     case "finished_topic":
@@ -52,8 +51,8 @@ function new_question(type, question, tries, progress) {
     }
     $("#submit").off();
     $("#submit").click(postAnswer);
-
     $("#tries").html(tries);
+
     $('#topic_progress').css('width', (100*progress)+'%').attr('aria-valuenow', 100*progress);
     MathJax.Hub.Queue(["Typeset",MathJax.Hub,"question_div"]);
 
@@ -90,11 +89,17 @@ function getFeedback(response) {
     var method = response["method"];
     var params = response["params"];
 
+    if (params['type'] == "info") {
+        getQuestion();
+        return;
+    }
+
     switch (method) {
     case "right":
         $('#comments').html(params['comments']);
         MathJax.Hub.Queue(["Typeset", MathJax.Hub, "#comments"]);
         $("#submit").html("Continuar");
+        // $("#submit").toggleClass("btn-info btn-primary");
         $("#submit").off();
         $("#submit").click(getQuestion);
         break;
@@ -123,7 +128,7 @@ function getFeedback(response) {
     }
 }
 
-
+// ===========================================================================
 $(document).ready(function() {
     getQuestion();
     $("#submit").click(postAnswer);
--
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