My Samsung HT-Z510 player seems to play certain DVD's in full screen mode even though the DVD's are widescreen. I have noticed this especially on Warner Bros. movies and also ones that have an aspect ratio of 1.66.1 or less. I went through my picture options and it seems that when an HDMI cable is connected from the receiver to the TV, it automatically converts the picture to HDTV/wide and will not let me change the options to 4:3 letter box. When I have component cables connected I am able to change the options. Obviously, component is not as good as HDMI. Does anyone know what's up with this? Are there any fixes or hacks for it? Appreciate all the input I can get.

Thank you