Hi Andreas:
In SVG the coordinate system origin (0/0) the origin is on the top left. That might be the reason.
But then, the ruler in Inkscape tells the opposite, zero is on the bottom of the page, which actually contradicts the SVG coordinate system. Maybe the inkscape developers wanted to stick to what other vector illustration programs do and not to the SVG conventions.
Thanks for the clarification, this explains the behaviour. However, I think it is an error to implement things this way. Either stay with the other illustration programs' way (0 on the bottom left corner), or with the SVG way (0 on the top left corner), but don't mix both ways in one drawing. I would like to suggest this to the developers. Do you know how I can do that?
Thanks,
Paulo