The "security and nonsecure items" message in IE is being caused by an issue in Dojo. For more, see the discussion on the WebWork forum.

There is a workaround available from the Dojo mailng list.

In short, line 79 in dojo/src/storage/browser.js

should be replaced with

Also try to search dojo.js and see if the following exists

if it does should be replaced with