I'm wondering why my Panasonic keeps adjusting itself in the middle of the program. I'll put it on 'just' or 'full' mode and every so often, it'll just switch to 'zoom'. When I'm watching the news or some program that has the logos and tickers, this is fine. However, when I watch any movies or a movie channel this becomes a little bit frustrating. Especially when it adjusts several times before settling on a mode. Is there any way that I can disable this feature?