In a scenario where the URL iview is not opening up correctly in IE. When you Deltalink this ivew to a new page the page shows blank screen in browser IE and It works only in Chrome and Firefox.
The issue could be replicated as:
1. Log in to Portal
2. Content Admin > Portal Content > *some* Folder > UI5 application > Action planning Iview
3. Now Click on Iview for Preview and its opening up in a new window (this is the expected behaviour).
4. But when you have delta linked this Iview to a Page > Action Planning page.
When you click on the page ,it is opening up a blank page.
In case of Portal 7.4 and it could be likely to see this in other versions of portal also that the application would work fine for the Higher versions of IE like 10 and 11. The issue arises for lower version of IE like IE9 and the Application should work fine in Chrome once security checks are disabled in the browser.