It could be something to do with the signal. A lot of American TV looks 'fuzzy' over here because of the different number of lines used in each of the TV systems. It could well be that the conversion in reverse has a similar effect.
i remember when i used to have fox thinking that their cameras suck, but then i saw a game that was previously aired on pay per view (same feed) and it was crappy when aired on fsw. i think they make it crappier on purpose ??????
That pretty much it. The conversion process effects the quality much like making a copies of a VHS tapes.