Why does OSQA serve incorrect tag information after user makes a change to their interesting tags?

I created a view where a user can see any question with a tag that they marked as interesting:

mymarkedtags = MarkedTag.objects.filter(user=request.user.id, reason='good').values('tag')
return question_list(request,
                     Question.objects.filter(tags__in=mymarkedtags),
                     _('Questions with tags that you starred'),
                     None,
                     _("Questions with Starred Tags"))

When I run this on my development site (sqllite) it always works. When I run it on webfaction (mysql) I notice that if I change my "interesting tags" in the sidebar and then go to the above view it still shows me questions with my old "interesting tags". logging out/in has no effect even though in the sidebar it clearly correctly saved my changes. I thought this might be a cache issue, but i have cache set to dummy://. If I just restart my webfaction server and then refresh the above view, it gives me the correct questions with the new "interesting tags".

UPDATE: Instead of restarting my server, if I just want a while and then refresh the page it will give me the correct information. Seems like a cache issue to me?