Hi, I'm new here.
I love 4.8, but unfortunately I too am experiencing the silent ringer. I'm an ancient Juicy user attempting to jump ship to something a little more modern since Juicy has been abandoned. I first flashed to the Sprint Shipped ROM, then to 4.8. Hard reset twice. The only extra thing I've installed is SlingPlayer, that's it.
My ringer worked fine the first day, and today, suddenly no ringer. I created the 'My Ringtones' folder, but no dice. I did notice that my ringtone automatically reverted itself back to 'Ring-Innovation'. I did a soft reset and switched back to my preferred ringtone 'Ring-Standard', and now I have a ringer again. Who knows for how long though. I'll keep an eye on it.
Hopefully we can resolve this because it's a complete dealbreaker--I simply must have a phone that rings when somebody calls, above all other bells & whistles.