Might be something like this: http://forum.xda-developers.com/show...39&postcount=4
It can be any program that is not closed properly (eg. running in the background), like Youtube.
Does it also occur when your device is rebooted and NO program is started? (See in the apps listing which apps are running right after resetting)
Samsung Galaxy Note 2 (WW), NEAK kernel, ProBam 4.4.6 (PAC 4.3.1) , PhilZ Touch 5 (CWM v18.104.22.168) CyanogenMod 10.2.0
HTC One X (WW) CWM, ViperX ROM - broken screen
ASUS TF300T (WW, Unlocked, CWM, Rooted JB OTA)
HTC Touch HD 2 T8585 (flashed to Android)
Hitting 'thanks' is completely free and friendly!