Thanks for the reply Cos. Yeah that's what I thought it was. You can't really see it at all, but if it's all white, it's a bit noticeable. I just hope it doesn't spread. I really can't upgrade anytime soon. I bought it used on CL for cheap, so no warranty. The TV does give you beautiful colors once I calibrated it.
Typically in situations like you discuss, they don't spread unless you mishandle the tv, I would be very gentle if you move the tv around, but even then it's fairly unlikely it will increase.
My wager is that the only reason you notice it is that you saw it once and you always look for it when you watch TV, I speak from experience, but the average person would never notice it.
I have the same problem with Home Audio Buzz/static, so much so I installed a dedicated circuit and switched out my amps