Originally posted by Darkware
I'm not sure what you mean by "the bit between 0 and 1"..... There is nothing inbetween 0 and 1. There is no 1/2 frame. You have frame 0 and you have frame 1.
Actually, Darkware, you have frame 0 and frame 1, and everything in between. Both in the timeline and in the render globals you're able to input decimal numbers like 1.25, 1.5, and 1.75. So since you are also able to input frame 0.5 then yes, there is a 1/2 frame. 
Dave Baer
Professor of Digital Arts
Digital Media Arts College
Boca Raton, Florida
dbaer@dmac.edu