Seen it in XP and Win 7 and FG 1.5.5rc1. These days flash has become site specific I presume...
EDIT
I also find FG listing the full set of available videos of a title in you tube. That is terrific...

But why add small ,medium , big to the clip name? Instead if possible the bit rate like 360p or 480p sounds better if at all required. Even if it is just the file , so much the better.