Hey,

not sure if anyone who can answer this reads here, but I stumbled across some strange conversion behaviour.
I created a box and this is the result for different sizes:
x mm in gui = y internal px in the svg file
10mm = 35,433071
100mm = 354,33072
1000mm = 3543,3071
10000mm = 35433,07
100000mm = 354330,72

The reason I had a look at this is because I want to add something to the svg externally by some scripts, but now I'm not sure how to convert my mm scaled things correctly to the px in the svg file...since the difference is very small it's no big deal, but numbers are numbers and 10*x should be 10*a*y if x=a*y

This is a known issue, it's currently being discussed again in the devel mailing list. The fix doesn't seem to be trivial.

ok thanks, inkscape accepts mm in the svg so i let inkscape handle the conversion...