I still am seeing this. The easiest way to explain it is that if you open up the portal, you can click and open a qlikview just fine, after about an hour? if you click on a Qlikview it will bring you to the sign on page. If you refresh the portal page it will relogin and you will be good to go. This is annoying. There must be a setting somewhere but I haven't hit on it. I have tried 99999 minutes in most timeout places I can find but so far no joy.