Hey there!
I am using the inkscape extension "Sozi" for presentations in a web browser. There is also a possibility to link objects to the frames (the frames are determined in sozi). But as i link a object, it changes its position in the browser! That means, the position of the object is different in inkscape and the browser.
There is a description how to link objects to certain sozi-frames: http://sozi.baierouge.fr/pages/tutorial-links.html