IE showing a prompt saying "This page contains both secure and nonsecure items" when using dojo

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

storeParts.push('codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0"');

should be replaced with

storeParts.push('codebase="https://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0"');

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

_607.push("\tcodebase=\"http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0\"");

if it does should be replaced with

_607.push("\tcodebase=\"https://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=6,0,0,0\"");