I bouight a WD TV Live at Offoce depot about two weks ago. It seemed like it could not go more than about 15 minutes without freezing and the whole screen turning to snow. I returned it to Office Depot and got another one. It seems to have the same problem. I have another one that I bought about six months ago at Frys and it does not have the problem.
In all three cases, I upgraded to the latest firmware when I first installed it.