LiveCode Forums.

Thank you jacque for trying to help us so quickly.

Here is what we found. Unfortunately it took three of us to almost 11PM on a Friday before a long holiday weekend to figure it out:
Since we set up a new machine to use for livecode android development, it had jdk 7 installed.
The jarsigner in jdk ...

We are having the same issue with keysigning from 5.5.

While google play accepts the signed app with no problem, it can't be installed on devices.
Even sideloading the app will not allow us to install the signed app, but if I go back to debug signing it works fine.

1. I have removed all debugging ...