Join Date: Nov 2006
Location: Waterloo, Rogers Cable Internet, Panasonic 55" Plasma, Insignia 5101HD, Cisco 8642, Kaleidescape
So far I've not experienced any macro blocking with the 8642 either during playback or trickplay.
In fact, I recorded and watched The Amazing Race and playback was fine.
Perhaps you have signal strength issues? Both a weak signal and a signal that is too hot can cause issues.
My HT equipment: Panasonic 55" Plasma, Insignia 5101HD, Chromecast, Kaleidescape 3U Server & M500 Player