Thanks for the responses.

It's definately the VP150. If I pick it up and move it I can see the effect move and disappear from the screen.
The side speakers are three feet away so that should be safe.

Not sure if it takes time to take effect after a move or just because it's more visable with certain colours but even the phone books I added don't work now and I get a purpleish blotch on light colours (just watching StarWars II. Major base in that one )

So what's the number I should call? The toll free line?
1-866-294-6688

Thanks
Peter.