Two different issues I would say.
Excessive errors & loss of data due to signal conditions is one problem. The way the playback system handles it is another. Similar to DVD playback, dropouts due to disc imperfections or just a bad burn produce similar results. Different players handle it differently.
AFAIC, this is not usable as a DVR. It's great as a tuner as HDTV1080p states, but a up to date functioning DVR, absolutely not! I still believe in the product, it's who is trying to peddle it, I don't.
And to the one post newbie, there is and was no nitpicking in my list. If I was to "nitpick", the list would be 2x longer.
Abundant OTA television is what makes this country different from all others. Lets keep it this way. If you like Wi-Fi so much, OTA fits right in. After all, it is wireless.