[Inkscape-user] Fit page to selection bug?

Hi, when I try to resize the canvas of an SVG file, sometimes the drawing shrinks as well.

Example: http://commons.wikimedia.org/wiki/Image:Anatomy_of_an_amiotic_egg.svg

Steps to reproduce: 1. select everything 2. open document properties 3. click on Fit page to selection

Result: document gets resized, but image gets resized as well.

Desired results: I want the canvas to shrink to fit the original image.

Is there something I'm doing wrong? I'm using Inkscape 0.45.1 on Windows XP.

Cheers, Kyungjun Lee