The reason rests with the aspect ratio of the program's transmission.
When people aren't short and fat, the 16x9 broadcast aspect ratio is being show in it's 16x9 format.
When people ARE short and fat, that's usually an indication that it's a 4:3 picture being stretched to 16x9.
The most common ways to fix this is to take the Wide View setting off either the source (cable box, DVD, sat, etc.) or the television's picture settings.
It's likely that your aspect ratio is off, which can be adjusted. The source of this, again, could either be the TV or cable box.
Keep me posted.
I am wondering why, when my new 46/750 Samsung is showing a program in 16:9, that people sometimes look shorter and fatter than they should? They look distorted or compressed and unrealistic. But this does not happen on all programs. On other programs people look completely normal. Is their an explanation for this? And, even better, is there a way to prevent it? Thanks.