Comstant Playback Error

Hello. Anyone got any ideas on this? Get the playback error sporadically, sometimes every 5 mins. Happens on live tv, recorded tv, OTA stations, and internet streaming statons. I can back out and pretty quickly get back to what i was watching, but its annoying. Have rebooted. Firmware is updated. Guide is updated. Cleaered cashe. Can it be the antenna signal, even if it happens irregularly during recordings or on internet (non OTA) channels? Netflix does occasionally buffer in the middle of a show, but could my internet dropping for a millisecond trigger such an error? Thanks.

If Netflix buffers in addition to Tablo the I would look at your network. Wireless? Wired? Router? ISP?