I've read the recent posts regarding this headache and am wondering how common it is. I'm interested in getting a 320 (eventually), but am concerned about this problem. Once it's installed, with the help of some friends, I won't be able to go tweaking things back there without some help, which isn't always available. And checking the circuitry in the wall's nearly impossibe, too. So, I'd just like to find out how common this is. Thanks.