Not much progress
The Bell Aliant guy came today. I had recorded some of the issues I was having to make sure he could see them. He said there was a definite problem so proceeded to replace a cable (hole in house) swap the PVR and finally swap the modem.
The main issue seems to be with TSN, Sportsnet, CBC. etc. All the Canadian channels that show live sports - hockey is the worst - basketball not good either - have a pulsing flash every 10 to 15 seconds. The quality of these channels is quite poor. The NFL football on CBS, Fox were not bad.
The guy said he had not seen anything like it before but couldn't think of anything else to do. I am not sure what to do now - may have to cancel the fibre-op bundle - but don't really want the hassle.