I'm seeing these on Sat and OTA channels. They're angled down from left to right at, maybe, 10 degrees. Anyone else (look closely)? I haven't tried to reboot yet, but did a soft boot this am.
I am not seeing this on my TV. If your TV set is CRT-based, I would try adgusting brightness and contrast settings down a bit.
This could also be some interference. Check your cables and connections.