Index: indico/MaKaC/webinterface/pages/conferences.py
===================================================================
--- indico/MaKaC/webinterface/pages/conferences.py	(revision 3daa2ef1ce78f88255186205e423cf8d10113a54)
+++ indico/MaKaC/webinterface/pages/conferences.py	(revision 841c782895da4d8aa8011fdffd4df090c6bf27c2)
@@ -1146,5 +1146,5 @@
         vars = wcomponents.WTemplated.getVars( self )
         tz = DisplayTZ(self._aw,self._conf).getDisplayTZ()
-        vars["ttdata"] = schedule.ScheduleToJson.process(self._conf.getSchedule(), tz)
+        vars["ttdata"] = simplejson.dumps(schedule.ScheduleToJson.process(self._conf.getSchedule(), tz))
         vars['eventInfo'] = simplejson.dumps(DictPickler.pickle(self._conf, timezone=tz))
         return vars
@@ -3175,5 +3175,5 @@
         vars['rbActive'] = info.HelperMaKaCInfo.getMaKaCInfoInstance().getRoomBookingModuleActive()
 
-        vars['ttdata'] = schedule.ScheduleToJson.process(self._conf.getSchedule(), tz)
+        vars['ttdata'] = simplejson.dumps(schedule.ScheduleToJson.process(self._conf.getSchedule(), tz))
         vars['eventInfo'] = simplejson.dumps(DictPickler.pickle(self._conf, timezone=tz))