Originally Posted by wolftail
Sadly all Dev Kindlets do not work anymore on Kindle Touch with firmware 5.1. The error generated: "The item you attempted to open is incompatible with this Kindle. Please try to update your Kindle from Settings. If the problem persists, contact Kindle Customer at www.kindle.com/support
brings an addition to /opt/amazon/ebook/security/defaultPolicies.json
file: now there is an property isProductionKey
set to true
I hasn't KT near me, so I can't check, whether setting of this property to false (or removing it entirely) restores work of Dev Kindlets...