Here's a picture of the roster on my iPhone 4c running iOS 7.0.4. Roster was saved with version 3.4c #378 of Army Builder and newest Warhammer rules:
Here's a link to the .RST as well:
https://dl.dropboxusercontent.com/u/...ts%20-%202.rst
Everything appears fine in the desktop application. If I tap on the "Engineering Runes" label, it just flashes and nothing else happens. Same goes for any other runic "slot" (Talisman, etc).
Hope that helps!