The PHD8 is about the most resistant to image retention of any plasma that I have seen. I had one for 8 months and never saw a trace of retention despite pausing Sky+, leaving logos on-screen, etc. - it just isn't an issue.
I thought image retention was when say you pause a dvd player, after about 5 mins the screen goes black with just say a small logo (In the case of my oppo 971H) that moves around the screen.
When the logo changes places, the area where the logo was isn't the same colour as the background - hench image retention...nothing to do with screen burn? I thought all plasmas did this and was totally normal?