I have a stock Thunderbolt and use Ringo Lite to manage ringtones/notification tones since I like having different ones for different contacts. To use Ringo Lite, I need my default notification sound set to "Silent" (otherwise it'll try to play both at the same time) - which I do, but it keeps constantly resetting to other tones on my phone after a while. This usually happens if I reboot it or change the battery (which reboots it), but has at least once happened overnight (I suppose it could have reset like it occasionally does while I was asleep). It always seems to change it to one of 4 other ringtones and not in any set pattern that I can discern. Anyone know how to get it to STAY with the default tone of "Silent" for notifications?