Hi
I mentioned the text scrolling simply because the effect I had noticed disappeared when the video was exported. I appreciate that you indicated there was image stuttering and I wasn't certain if you had exported or not. You obviously did export.
However, using VP2.41 all my short texts (both large and small, short and long, small gap and large gap between them) showed up. (about 10 or so added to a 1 min clip). There was no stuttering of the image either so I'm not quite sure where that leaves you. 
Sorry
Nat