My unit is only a few months old so I'm considering a return. It seemed to run fine for a month or so but for the last severa weeks I've been getting the same problem as everyone else. I have 2 other non HD Direct Tivo units ( 1 stock R10 and a modded Hughes HDVR). On these 2 units the modded one seems to run better than the stock R10. Is there a software upgrade recommended for the HR10 250?