Hey,
Strange problem. About a week ago, my G stopped ringing reliably. When the power was off, it woudldn't ring, and then when I turned it on and touched anything (or tapped any icon), I would get simultaneous "missed call" and "voicemail" alarms, and it would show that the call had JUST come in (even if it had been hours old).
So, I did a hard reset and reloaded a stripped-down version. The problem originally started right around the time I loaded Animated Today and Macromedia Flash, so I avoided those two apps, as well as many others.
To my large surprise, the newly-formatted phone is doing the same darn thing.

Any ideas from anybody on what might be causing it or how I might try to fix it?

Thanks.