Logging in through the portal causes browser to fail on Internet ExplorerDescriptionLogging in through a CMS portal page and navigating to a page that includes the knowledge_home_launcher.do page in an iFrame directs to kb_home instead of $knowledge on Internet Explorer (IE9, IE10, and IE11).Steps to Reproduce Open a Fuji instance on IE9, IE10, or IE 11. Configure the CMS page knowledge_splash.do to include an iFrame to kb_home_launcher.do: Navigate to Content Management > Pages. Open Portal - Knowledge Splash. In Related Links, click Edit Page. Click Add Content. Select New iFrame. Add the iFrame to the page by clicking one of the Add Here dropzones. To add the knowledge_home_launcher.do URL, click the Click here to configure this reusable IFrame block. Name: knowledge home Frame name: gsft_main Sizing: Expand to fit URL: /knowledge_home_launcher.do Click Submit. Launch CMS (for example, https://<instanceURL>/ess).This step is important - it is only reproducible logging into CMS. Log in as any user. Navigate to knowledge_splash.do by clicking the Knowledge link.You are redirected to kb_home instead of the expected $knowledge page. Important Notes: If you login at navpage.do first, then navigate to /ess/knowledge_splash.do, the $knowledge.do is displayed as expected in IE If you perform the workflow above using Chrome or FireFox, $knowledge.do displays as expected It appears this is returning NULL in IE when logging in using the ESS portal instead of logging in using navpage gs.getSession().getProperty('user_agent_version').WorkaroundThere is no known workaround for this issue. If you are able to upgrade, review the Fixed In field below to determine the versions that have a permanent fix to this issue.Related Problem: PRB648931