Please can someone from Adobe reply? I was told to create a new post and include my app ID and someone would look into it?
icons are here: App Icon - Graphics - iOS Human Interface Guidelines
ensure your app has the following icons for the new (sorta i suppose after today) 6/6S
120px by 120px
87px by 87px
80px by 80px
58px by 58px
Thanks. That solved the problem but I don't know why 6.3.0 requires all those sizes when 5.x was happy to use other sizes of icons. Ideally it would be sensible if the OS would only require 1 high res icon which it rescales on the fly.