Can anyone tell me how I can find out what is causing notification sounds? My Hero will, at times, beep randomly, but leave nothing in the notifications bar. If I open a task manager I can see that HTC Checkin Service and Settings are the only things running. This process will repeat, whether I close the apps or not, and run the battery down. Is there some kind of system log I can look at to find out what is causing this? It seems weird that the phone would make the sound but leave no evidence of a notification. thanks in advance!