Just to add, I am another one with the 'no sound, only vibrate' problem, so it is totally isolated to a handful of users only. I never did anything different other than upgrading periodically to the latest version. I have tried uninstalling, removing all folders/files (that I am aware of), rebooting, reinstalling etc etc. The messaging functionality works perfectly and the app is completely usable - the only issue I have is the lack of notification sound.

Big thank you to all the developers but if they have any pointers on this that would be great.

Thanks,