I've had to disable my Yahoo email because the notifications are driving me insane. In the email settings, I unchecked "email notifications" but when I run my Advanced Task Killer, it resets back to default. So I tried removing the task killer, but this time it went back to default the next time I powered my phone on. I also tried setting the notification sound to "Silent", but that also goes back to default. It hasn't always been like this. Could it be an update I need to remove?