I was just playing Broken Sword 1 (so it was running with the scummVM that sold-out installs) and i noticed that the picture was stretched, and there was quite a bit on the right side of the screen that i couldn't see. I installed the latest ScummVM v0.10.0 and found out that the same problem occurs... its only when i press alt-enter, and view it in the small window format that i can see the entire screen.
I tired playing around with the video options in ScummVM, i even brought my windows resolution down to 1024x768 - but as soon as i play broken sword full screen, its as if i has zoomed in too much and isn't centred.
selected hq2x from the graphics filters options
default seems to stretch the screen, and factor 3 filters quit to windows, factor 2 seems the way to go