I had someone install a new template and while doing an upgrade on the site and installing this template the front end LOGIN suddenly was no longer working correctly. When you log in, it brings you to blank pages or when redirected in the login to some of the pages but not all. WHen you click on source, it then shows only a little part but not all of the html. Also when I activated another log in , I could not get it to work. Also changing the template to beez for example does not help...