I noticed with the update to 4.4.3 when you change the default notification tone to none, hangout's notification then defaults to hangouts notification rather than no notification. I'm not sure if this effects all apps. On 4.4.2 it would just be silent. Anyone else notice this or is it me? I had to add a silence notification to my sdcard internal memory to have a silent notification.
Re: 4.4.3 notifications
No, I haven't noticed that, however, I have something always sounding on my phone it seems...lol