Upgraded my 3600X to 7.7 and had some odd video playback issues on multiple channels (Hulu, Plex, HboGo, Boomerang) and multiple televisions. During playback, the video would suddenly go crazy and flash and then end up in a kind of old school, TV station off bars in a variety of colors/patterns and slight audio chirping, but audio was ok in general. Video definitely messed up. We have never experienced this behavior before with any Roku device. To resolve, we would exit the channel and resume playback and all would be well for a while and then the same result. Seems like it is hitting a buffer of sorts, but I did not time the events. My family got annoyed and we downgraded to 7.6 and all is well again.