When selecting multiple objects close next to each other, and then choosing
"distribution - horizontal - spacing", the distance between the last two object
on the right hand side is calculated wrong. It probably doesn't take into
account the line width.

Actions to reproduce: Create six 2,5cm x 2,5cm squares and give them a line
width of 0,40cm; put them next to each other at the same height on the page.
Select these six objects, and then right-click, choose "distribution... -
horizontal - spacing". Now notice that the distance between all of the object
has become equal as it should, except the distance between the last two objects,
that is way off.