Illustrator CS2: Image automatically resizing after close


I was hoping someone could explain why this is happening…

I have a 1024 px X 768 px document with a placed jpg which is 96 DPI and the exact size. The problem is if I close and reopen the document the image ends up resized slightly smaller than before (1023.997 X 767.998). I could just rebuild this all in Photoshop, but am hoping there might be a simple solution, or some setting I’ve overlooked.

Thanks in advance for any help or insight you can offer.