The emulator is probably intentionally clipping the bar.
The Mega Drive also exhibits this behavior by having a bar on the right hand side of the screen that is the first colour of the first palette line... this is even more prevalent on PAL consoles by having bars on the top and bottom too.
Long story short, the bar is suppose to be there, get your NES modded if it is that annoying.
Also, if the bar is there depends on the TV too, some TV's preserve it, some don't.
My Plasma keeps the WHOLE bar while my CRT clips off some of it.
I don't actually know if you can even render anything in that bar.
This post has been edited by Kevin Rudd on Oct 4 2009, 01:33 AM