Comment 4 for bug 526875

Inkscape 0.48+devel r10611

Behaviour seems to be back (don't know when - I seldom uses other units than px anyway)

It's certainly known, but I add a list of steps to reproduce so that there should be little chances to be misunderstood:
* Open Inkscape (with default template)
* Open "Document Properties" dialog box
* Set "default units" to mm.
* Go to the "Grids" tab and hit New button.
** Expect "grid units" to be mm, but they're still px.

* Have to manually change "grid units" to be mm and set spacing to 0.1 or 1.