I have this line of code in my JSP. (I\'m using struts 1.3)
When the act
TL;DR: Ensure the two sites are in the same zone as well. I had sites in two different zones and calling up the zone stack broke IE.
For anyone that stumbles across this (like I did), but finds that the Protected Mode setting doesn't resolve it, I wrote this up on another thread: https://stackoverflow.com/a/12167814/649249
Resolved it for me.