I've found out a solution for the "nosound" issue. I've done just like this: - Uninstalled Wazapp - Rebooted the phone - Removed (actually renamed) the folder .wazapp in home/user/... - Removed (actually renamed) the folder Wazapp in home/user/MyDocs.. - Installed the latest version on dropbox 17-10-2012 - Rebooted the phone - Launched Wazapp and syncronized contact list (at this point the ringtone sounds were active again but standby icons were a redsquare) - Rebooted the phone - Relaunched Wazapp and.. all worked! I wouldn't have been able to change the sound from the ringtone list (it sounds according to the chat sound alert in the phone setting), but who cares? It works perfectly now!! Good Luck to all!