Can you help me with a query! i have recently purchased a toshiba 36zp18q (36" widescreen tv), wow what a set, good picture, good size and very good sound, although there was just one problem whilst i was watching sky i was getting wavy lines going from the bottom lefthand corner to the top right hand corner (using scart). I spoke to a so called expert and he said to adjust the rf on the digibox! "i did this going through all the settings and there was no change! i then rang sky and they said to check all the scart leads etc (like you dont do that first) then we went through the rf settings again , guess what no joy . After this they said change the pal setting on the digibox to rgb "great it fixed the problem" but they said i might have a problem with my tv as you shouldnt have to do this. So my questions are- what are the main differences between pal and rgb, and does this mean i have a problem with my set because the sky box looks better when set to rgb output.