Hello,
We are not able to reproduce the problem updating application from King to Lombard build on iPad 3(6.1.2) and iPhone 4(7.1.1) devices. Could you please share the AIR SDK version, device name with version your users are using. This will help us in reproducing the problem. Moreover, you can also check the application Dropbox - SharedObjectExample.zip I have used to reproduce the problem. Please let us know if I missing anything.
Regards,
Nimit