![Wink ;)](./images/smilies/icon_e_wink.gif)
When I checked, all of the other items in the war room (the key, guard armour, fate cards etc) were also missing, so it's either some Bedknobs and Broomsticks type weirdness happening, or it's a a bug!
Reloading the save didn't fix the problem (couldn't attach the save due to the size). Let me know if you want the save game sending.